Changing the Primary and Secondary monitor

Bad_Pool_Header Error - What is it?

Bad_Pool_Header is one of the types of BSOD (Blue Screen of Death) error codes. This error triggers a problem with Windows memory allocation. When this error message occurs, the screen turns blue and locks the user out of the application running on the system. The computer shuts down or restarts.

Solution

Error Causes

There is no one particular cause for the occurrence of the Bad_Pool_Header error code. It may appear on your system due to multiple reasons such as:

• Device driver issues
• Cluttered disk
• Disk writing issues
• Faulty memory hardware

Driver issues and disk writing issues occur when your try to update new driver versions. During this process, users often forget to remove the files of the uninstalled version from the registry. And due to the presence of the uninstalled driver files in the registry updating and disk writing becomes an uphill task which leads to the Bad_Pool_Header display on the computer screen. The main database of your system is the registry so you need to keep it clean to avoid disk cluttering. The hard disk clutters because the registry saves all the activities that you perform in your system. It saves junk files, internet history, invalid entries, and other unnecessary files. This occupies a lot of your disk space thus resulting in disk cluttering and faulty memory hardware issues triggering the Bad_Pool_Header. Ignoring the Bad_Pool_Header error is not wise. It is advisable to repair the Bad_Pool_Header right away as it can lead to serious threats like system failure and data loss.

Further Information and Manual Repair

The easiest, time and money-saving way to resolve the Bad_Pool_Header error on your system is to install Restoro. This is a high and multi-functional repair tool that features a powerful inbuilt registry cleaner, anti-virus, and a system optimizer. This tool is the one-stop solution for all your PC-related errors including the Bad_Pool_Header blue screen of death error. Whether it’s a driver issue, faulty memory, or cluttered disk, all the causes triggering the Bad_Pool_Header error code fall under the registry which is why it is recommended to install Restoro. Its innovative and powerful registry cleaner scans detect and repair all the errors related to the registry in one go including the Bad_Pool_Header errors. With this helper, you can easily remove all the unnecessary files cluttering your hard disk and damaging your registry. It wipes out the clutter in seconds and frees up disk space.

Why Should You Clean The Registry?

Sometimes the registry also gets cluttered by malicious software like viruses, spyware, and malware. These may also take up your disk space and prevent you to perform disk writing successfully and also corrupt the registry. The privacy error finding utility embedded in Restoro helps you scan for such malicious software on your system and removes them immediately. It lends the software anti-virus properties. When it comes to using repair tools, many users who are not technically sound often worried. They think it may be difficult to operate. If you think the same way, let us tell you that Restoro is very easy to use. It is integrated with a high-functional yet user-friendly interface complemented by simple navigation.

Restoro Special Features

This makes it simple for all levels of users to operate it regardless of whether they are technically adept or not. Restoro is compatible with all Windows versions. You can download it with ease and run it for scans on any Windows version you have installed on your system. To get started, all you have to do is:

• Click here to install Restoro.
• Once the installation is complete now run it to scan for errors like the Bad_Pool_Header
• After that simply click on the ‘repair’ button to resolve

You might be familiar with the Encryption File System or EFS algorithm if you rather keep your files and folders encrypted. Encryption File System is a built-in feature in Windows 10 which allows users to secure their important files. Although there is an alternative way for you to secure your data on your Windows 10 computer, you can’t ignore the fact that the main advantage of an Encryption File System over BitLocker is that the former can help you encrypt a particular folder rather than encrypting the whole hard drive partition. If you move a file inside a folder encrypted with the Encrypting File System it will automatically get encrypted. There are some users who like this feature but unsurprisingly, there are some that don’t. So if whether you want your files encrypted when you place them in an encrypted folder or if you want to keep it as it is, read on as to how you can do it either way. You can enable or disable automatic encryption of files moved to encrypted folders in Windows 10 using the Registry Editor or the Group Policy Editor. Before you proceed, make sure to create a System Restore Point first because the modifications you’re about to make in your computer might affect its overall functioning so if anything goes wrong, you can always undo the changes. Once you have that covered, refer to the options given below to enable or disable automatic encryption in Windows 10.

Option 1 – Enable or disable automatic encryption using Registry Editor

• Press the Win key + R key at the same time to open the Run dialog box.
• Then type “Regedit” in the field and press Enter to open the Registry Editor and if a User Account Control or UAC prompt appears, just click Yes to proceed.
• After opening the Registry Editor, navigate to this key location: HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionPoliciesExplorer
• Next, right-click on Explorer and select New > DWORD (32-bit) Value and then name the newly create DWORD to “NoEncryptOnMove” and press Enter to save it.
• After that, double click on the NoEncryptOnMove DWORD and set its value to the following preferences:
  • 1 – Disable Auto Encryption of files moved to encrypted folders.
  • 0 – Enable Auto Encryption of files moved to encrypted folders.

• Now close the Registry Editor and restart your computer to successfully apply the changes made.

Option 2 – Enable or disable automatic encryption using the Group Policy Editor

• Press the Win + R keys to open the Run box and type “gpedit.msc” in the field and press Enter to open the Group Policy Editor.
• After that, navigate to this path: Computer ConfigurationAdministrative TemplatesSystem
• Next, look for the “Do not automatically encrypt files moved to encrypted folders” option and double click on it to set the policy. From there, you will see the following description:

“This policy setting prevents File Explorer from encrypting files that are moved to an encrypted folder. If you enable this policy setting, File Explorer will not automatically encrypt files that are moved to an encrypted folder. If you disable or do not configure this policy setting, File Explorer automatically encrypts files that are moved to an encrypted folder. This setting applies only to files moved within a volume. When files are moved to other volumes, or if you create a new file in an encrypted folder, File Explorer encrypts those files automatically.”

• Now select one of the radio buttons below depending on your preference:
  • Not Configured or Disabled: Enable Auto Encrypt of files moved to EFS Encrypted folders.
  • Enabled: Disable Auto Encrypt of files moved to EFS Encrypted folders.
• Then click on the Apply and OK buttons to save the changes made.
• Exit the Group Policy Editor and restart your computer.

Fatal Error c000021a - What is it?

Fatal Error c000021a is a type of Windows stop error also known as the blue screen of death (BSoD) error. When this error occurs, it causes the computer screen to go blue and locks the user out of the current activity. This error code is fatal and can lead to serious issues like system crashes and freeze. The error code is usually displayed in the following format:

STOP: c000021a {Fatal System Error} The Windows Logon Process system process terminated unexpectedly with a status of 0xc0000034 (0x00000000 0x0000000)

Solution

Error Causes

Fatal Error c000021a occurs when the Windows kernel detects that either Winlogon.exe or Csrss.exe service processes have stopped responding or failed to load.  When this happens the error code pops up on the screen. Nonetheless, this is not the only reason for the occurrence of this error. There are plenty more reasons why Fatal Error c000021a may pop on your computer screen. These include:

• Missing or corrupt hardware drivers
• Faulty hardware
• Windows System Restore failed during the rollback process
• Malware or viral infection
• Registry issues

No matter what the reason may be, it is advisable to fix the error right away without any delays. Remember it is a fatal error and can cause a great deal of damage to your PC.

Further Information and Manual Repair

Fatal Error c000021a is a serious PC issue but this does not mean you have to hire an expert to get it fixed. The good news is that this error is actually quite easy to resolve. You don’t have to be a technical whiz or a computer programmer to fix Fatal Error c000021a on your PC. Here are some do it yourself methods to fix this error code right away without any hassle: Let’s get started:

Method 1: Update Your PC Drivers

As we mentioned about corrupt or missing drivers can be one of the many reasons for the occurrence of this error. So, check the drivers first. Perform a driver scan and make sure all your drivers are updated.

Method 2: Perform a Windows System Restore

To do this, first launch Task Manager by pressing CTRL+SHIFT+ESC on your keyboard. Now click on the application tab and then click ‘New Task’ then browse. After that, go to C:\Windows\System32\Restore  folder and then double click the rstrui.exe file. This will help start system restoration. Your computer will reboot during the process and hopefully, the error will be resolved. Nonetheless, if the error still persists then try methods 3 and 4.

Method 3: Scan for Viruses

Sometimes Fatal Error c000021a may also occur due to malware infection. Your PC may be affected by viruses hidden in different locations without you knowing about it. Therefore to resolve this error, it is recommended to run an antivirus and scan for viruses. If detected, remove them right away to fix the error code.

Method 4: Repair the Registry

Another method to resolve Fatal Error c000021a code on your system is to repair the registry. The registry stores all the information and activities performed on the system. If it is not cleaned frequently, it gets loaded with too many files unnecessary and obsolete files like the junk files, cookies, internet history and temporary files which corrupts and damages the registry thereby generating blue screen of death error codes like Fatal Error c000021a. Though you can repair the registry manually it can be both time-consuming and slightly difficult especially if you are not a computer programmer. Therefore it is advisable to download a registry cleaner to fix it right away.

Automatic Repair with Restoro.

Whether the Fatal Error c000021a code occurs due to viral infection or registry issues, download Restoro. This is a next-generation, advanced, and multi-functional PC Fixer. This software is deployed with multiple utilities such as a powerful registry cleaner, an antivirus, a system optimizer, and more. The registry cleaner scans the entire PC and detects all types of registry issues at once. It cleans the registry, wipes out all the unnecessary files, and restores the registry back to normal. Simultaneously, the antivirus embedded in this software detects all types of viruses including malware, adware, spyware and Trojans and removes them in seconds. The system optimizer feature ensures the speed and performance of your PC are not compromised during the repairing process. It ensures your PC works at its optimal speed. Restoro is a one-stop solution for all your PC needs. It has a user-friendly interface making it easy for all levels of users to work around. It is compatible with all Windows versions Click here to download Restoro and resolve the Fatal Error c000021a code on your PC today!

Code 42 - What is it?

Code 42 Error is referred to as a Device Manager Error code. Before we explain what this code indicates, it is important to understand what ‘Device Manager’ is and its functions.

Device Manager is basically a Windows tool that helps manage devices attached to the system such as the Printer, Scanner and the USB Device. The Device Manager Error code 42 occurs when a duplicate device is detected.

Error Code 42 is displayed in the following format:

“Windows cannot load the device driver for this hardware because there is a duplicate device already running in the system. Code 42”

Solution

Error Causes

Narrowing down to one particular cause for error code 42 is not virtually possible because it may be triggered due to many underlying reasons. These include:

• When a bus driver incorrectly generates and creates 2 identically named devices
• When a device with a serial number is found in a new location without being removed from its original location
• Mis-configured drivers

No matter what the reason for this error code,, to avoid inconvenience and to ensure proper hardware performance, it is advisable to fix it right away without any delay.

Further Information and Manual Repair

If you’re not technically sound, the code 42 message display can panic you. But don’t worry, the error message sounds complex but it is quite easy to fix.

To resolve code 42 in a few minutes, simply try the methods given below. These methods are easy-to-perform, effective and more importantly require no technical expertise.

Method 1 - Restart Your System

Code 42 can pop up due to some temporary glitch in the Device Manager. By simply restarting your PC, you can resolve this problem.

Therefore, first things first, restart your system. However, in case it doesn’t work out, try other methods.

Method 2 - Launch the Troubleshooting Wizard

Launch the troubleshooting wizard to find the underlying problem and resolve it accordingly. To do this, proceed with the following steps:

• Go to the start menu
• Type Device Manager in the search bar and press enter
• Now click on the ‘General Tab’
• Then click on ‘Trouble Shoot’ to launch the Troubleshooting Wizard
• After that follow the instructions in this Wizard to diagnose the problem and resolve it.

Method 3 - Restore Your PC to its Previous State

Another method to fix code 42 is to use the System Restore tool to restore your PC to its previous working state before the error popped up. To do this,

• Go to the start menu
• Type System Restore in the search bar and press enter
• Now click on ‘Restore my computer to an earlier time’ and then click ‘Next’
• After that select the restore point on the restore point list and confirm settings
• Restart your PC to activate changes
• Before restoring your PC to its previous state, create a backup. By creating data backup you can avoid data loss issues, which are likely to occur during this process.

Creating backup manually can be time-consuming and a painstaking task. The best way to create backup and restore your PC to its normal state is to download DriverFIX.

It is a user-friendly device driver management software that helps create data backup automatically and simultaneously restores your PC back to its normal working state in a few seconds.

This software is compatible with all Windows versions.

Click here to download DriverFIX on your system to resolve error code 42.

If you see the following error message in the File History tab of the File Recovery utility of the Windows Backup module in your Windows 10 computer, read on as this post will guide you in fixing it with the help of two potential fixes.

“An internal error has occurred: The specified resource name cannot be found in the image file. (0x90070716).”

You can also encounter this error when you run the System Image Backup function. As mentioned, you can resolve this error using two potential fixes namely checking the status of the Windows Backup Service and checking the settings in the Windows Registry. For more details, refer to the instructions provided below but before you proceed, it would be better if you create a System Restore point first.

Option 1 – Try checking the status of the Windows Backup Service

• First, you need to tap the Win + R keys on your keyboard to open the Run dialog box.
• Next, type “services.msc” in the field and click OK or tap Enter to open the Windows Services Manager.
• After that, you will see a list of services and from there, look for the Windows Backup Service and double click on it to open its Properties.
• Then check if its Startup type is set to Disabled. If it is, then change it to “Manual”. Note that this service is essential as it provides backup and restores capabilities.
• Now click on the Apply and OK buttons to save the changes made and then restart your computer. Check if the error is now gone.

Option 2 – Try checking the Registry setting of Windows Backup

• Tap the Win + R keys to open the Run dialog box.
• Then type “Regedit” in the field and tap Enter to open the Registry Editor.
• After opening the Registry Editor, navigate to this registry key: HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionWindowsBackup
• From there, look for DWORDs named “ValidConfig” and “ValidSystemImageBackup” located in the right-side panel.
• Once you found them, delete them or set both of their values to “0” and make sure that the base is Hexadecimal and click OK.
• Now exit the Registry Editor and restart your computer to apply the changes made.

If your Windows 10 computer or laptop keeps on going to sleep randomly even when you’re using it, read on as this post will walk you through the process of resolving the problem. There are a number of users who reported about how their Windows 10 computers would automatically go into Sleep Mode. One particular user claimed that when he installed a fresh Windows 10 version he began experiencing the same problem. It turns out that the screen goes to sleep but what’s odd is that the power lights and the keyboard are still working. The computer is also warm to touch which shouldn’t be the case when it is in sleep mode. And when some users tried checking the event log, it showed them that the computer didn’t actually go into sleep mode but it shut down instead. To fix this issue, here are some possible fixes that could hopefully work.

Option 1 – Edit the Power Plan settings using Control Panel

• Click the Cortana button and type “control panel” in the field and select the appropriate result to open Control Panel.
• After opening Control Panel, click on the Power Options.
• From there, select the “Edit Plan Settings” option and make sure that the option to “Put the computer to sleep” is set to Never.

Option 2 – Edit the Power Options using Settings

• Tap the Windows key + I to open the Settings app.
• After that, select Settings and go to the Power & sleep section.
• Next, set the system to “Never” when the device is running on battery power or plugged in.
• Now restart your computer to make sure that everything is working properly.

Option 3 – Try running the Power Troubleshooter

Another option that could help resolve the problem is the Power Troubleshooter. This built-in troubleshooter in Windows can help you get things up and running again.

Option 4 – Troubleshoot Sleep Mode issue in a Clean Boot State

The issue with Sleep Mode might be caused by some third-party programs installed on your computer. This program might be the one that puts your computer to sleep and so to isolate this possibility, you have to put your PC in a Clean Boot State using the steps below.

• Log onto your PC as an administrator.
• Type in MSConfig in the Start Search to open the System Configuration utility.
• From there, go to the General tab and click “Selective startup”.
• Clear the “Load Startup items” check box and make sure that the “Load System Services” and “Use Original boot configuration” options are checked.
• Next, click the Services tab and select the “Hide All Microsoft Services” check box.
• Click Disable all.
• Click on Apply/OK and restart your PC. (This will put your PC into a Clean Boot State. And configure Windows to use the usual startup, just simply undo the changes.)
• After that, try to install the Windows Updates or upgrade again.

Option 5 – Try checking the Sleep Advanced Settings

• Click on the Windows key and type “control panel” in the field and select the related search result.
• Next, select the Security and Maintenance option and click on the Power Options.
• After that, you have to select the Change Plan Settings but keep in mind that this option is barely readable so you need to read each option carefully.
• Now click on the Change advanced power settings button and a new window will appear.
• Then look for the “Sleep” option and expand it to select the Allow hybrid sleep” option. Turn this option off and close all the opened windows.
• Reboot your computer and check if your computer now functions properly. If it still didn’t work, you may have to reverse the changes you’ve made.

Option 6 – Try installing v9 or 10 of the MEI or Intel Management Engine Interface

Note that this option only applies to users who are using an HP laptop. And if your motherboard does not support Hybrid Sleep, you might have to downgrade the Intel MEI to version 9 or 10. To install v9 or v10, you need to go to the HP Drivers & Downloads page and look for the MEI driver version 9 from the website’s Driver Chipset section. Once you’ve downloaded the driver, install it and if a dialog box warning pops up, simply ignore it and proceed.

Option 7 – Update the device drivers

• Reboot your computer into Safe Mode with networking support.
• Tap the Win + R keys on your keyboard to open the Run dialog box.
• After that, type “devmgmt.msc” in the field and hit Enter or click OK to open the Device Manager.
• After opening the Device Manager, update all the outdated Device drivers on your computer.
• Next, right-click on all the driver entries that are appropriately labeled, and then click the Update driver option.
• Now restart your PC and check if your computer is now back to normal.

One of the most useful and powerful built-in utility in Windows 10 is the DISM tool. This tool can be used with the Command Prompt command line as well as for other purposes. However, it is not without flaws and there are times when you may encounter some issues while using it. One of the problems you can get while using the DISM tool is the following error:

“The scratch directory size might be insufficient to perform this operation”

This kind of error in DISM occurs when the DISM command is executed from the Windows Recovery Environment due to the limited size permissions of a delivery where the operating is being performed. To fix this DISM error, you need to follow the instructions laid out below. Step 1: First, tap the Win + R keys to open the Run utility and then type “cmd” in the field and tap Enter to open Command Prompt. Step 2: Next, you have to specify a scratch directory that contains the Windows folder and to do that, you can either use the DIR command or the BCEDIT command. So in the elevated command prompt type and enter “dir” or “bcedit”. Step 3: After that, you will see a list of folders inside the C: partition. Now you have to create a folder named “scratch” inside the partition. To do so, execute the following command:

mkdir C:Scratch

Note: The command you just entered will create a directory inside the root of the C: partition named Scratch. Step 4: Now that you’ve created the Scratch folder, note that each time you run any of the DISM commands, you have to enter the following code snippet in them:

/ScratchDir:C:Scratch

 Note: For instance, if you are using the DISM tool to repair the offline Windows image, instead of executing the “Dism /Online /Cleanup-Image /RestoreHealth” command, you now have to execute the “DISM /Image:C: /ScratchDir:C: Scratch /Cleanup-Image /Restorehealth” command. And if you want to remove a selected installed update package, you can use the “DISM /image:C: /ScratchDir:C:Scratch /Remove-Package /PackageName:Package_for_RollupFix~31bf3856ad364e75~amd64~~16299.196.4.9” command. Keep in mind that the mentioned package is only an example. And lastly, you also have to replace the drive letter in the new code snippet when you execute the commands given above.

One of the most basic and commonly used features in the Windows operating system is the copy and paste feature that helps users accomplish tasks in a faster and easier way. However, if you notice that it’s not working properly for some reason, then this post might be of help as it will provide you with options you can check out to resolve the problem. You can encounter this kind of problem with the copy and paste feature if some system files are corrupted or if there’s some third-party application or process that interferes with this function. Worry not though for there are some options you can check out to fix this. You can try to restart the rdpclip.exe process or the explorer.exe process. You could also try to reinstall the program where you encountered the issue with the Copy and Paste function. In addition, you could try clearing the clipboard history or run the built-in tools like the DISM tool and SFC scan. You could also troubleshoot the problem in a Clean Boot State or use the Refresh Windows tool. For more information, refer to each one of the options below.

Option 1 – Try to restart the rdpclip.exe and the explorer.exe processes

The first thing you can do to resolve the problem is to restart certain processes namely, the rdpclip.exe process and the explorer.exe process via Task Manager.

• First, right-click on your Taskbar and select the Task Manager.
• Next, look for the rdpclip.exe process and right-click on it, and select the End process option.
• After that, click on the File tab > Run new task and then type “rdpclip.exe” and tap Enter.
• This should help fix the problem. If not, you could also try to restart the explorer.exe process – just look for the explorer.exe process in the Task Manager and right-click on it, and then select the Restart option.

Option 2 – Try reinstalling the concerned program

If you only experience this issue on a particular program, you might want to uninstall this program and install it back again, and then see if it fixed the problem or not.

Option 3 – Try to clear the clipboard history

You could also try clearing the clipboard history as it has been known to help in fixing this kind of issue. You can clear the clipboard history using the command line.

• Tap the Win + R keys to launch the Run dialog box and type “cmd” in the field and hit Enter to open Command Prompt.
• Next, execute this command: echo off | clip
• After that, check if the Copy and Paste function is now working properly or not.

Option 4 – Try running the DISM tool

You can run the DISM tool as well to help fix the “Tile Database is corrupt” error. Using this built-in tool, you have various options such as the “/ScanHealth”, “/CheckHealth”, and “/RestoreHealth”.

• Open the Command Prompt with admin privileges.
• Then type in the following commands and make sure to hit Enter right after you type each one of them:
  • Dism /Online /Cleanup-Image /CheckHealth
  • Dism /Online /Cleanup-Image /ScanHealth
  • DISM.exe /Online /Cleanup-image /Restorehealth
• Do not close the window if the process takes a while as it will probably take a few minutes to finish.
• Once it’s done, check if it was able to fix the corrupted Start Menu or not.

Option 5 – Try to run System File Checker or SFC scan

• Tap Win + R to launch Run.
• Type in cmd in the field and tap Enter.
• After opening Command Prompt, type in sfc /scannow and hit Enter.
• Once done, restart your computer.

Option 6 – Restart your computer in a Clean Boot State

If a third party program like antivirus is the one that’s causing the problem, you can try to put your computer in a Clean Boot State to isolate the issue by following these steps:

• Log onto your PC as an administrator.
• Type in msconfig in the Start Search to open the System Configuration utility.
• From there, go to the General tab and click “Selective startup”.
• Clear the “Load Startup items” check box and make sure that the “Load System Services” and “Use Original boot configuration” options are checked.
• Next, click the Services tab and select the “Hide All Microsoft Services” check box.
• Click Disable all.
• Click on Apply/OK and restart your PC. (This will put your PC into a Clean Boot State. And configure Windows to use the usual startup, just simply undo the changes.)
• Now try to connect your device or copy the files to your external device again and check if the problem with the Copy and Paste function is fixed.

As of late, a number of users reported experiencing a problem where their Windows 10 computers get stuck on Airplane mode for some unknown reason. According to the affected users, they were unable to turn off the Airplane mode which means that their computers are also not able to connect to the internet. One of the possible reasons why this kind of issue occurs is that there could be a bug with the airplane mode or it could also be the doing of faulty network drivers or physical switch that’s turned on, and so on. If you are one of the few users who experience the same issue, then read on as this post will guide you on what to do if your Windows 10 computer gets stuck on Airplane mode. There are a couple of suggestions you can check out to resolve the problem. You can try to check the status of the Radio Management service, flush the DNS cache or you could turn off the airplane mode via system settings. You could also update the network drivers or turn off the physical switch for airplane mode or make some adjustments in the Windows Registry. For more details, refer to each one of the suggestions provided below.

Option 1 – Try to check the Radio Management Service status

• First, tap the Win + R keys to open the Run dialog box and type “services.msc” in the field, and hit Enter to open the Windows Services Manager.
• Next, look for the Radio Management service and select Properties.
• From there, change its Startup type to Disabled and click on the Apply and OK buttons to save the changes made.
• Once done, restart your computer and check if you can now turn off the airplane mode.

Option 2 – Flush the DNS cache

You could also try to flush the DNS cache to fix the “ERR_ICAN_NAME_COLLISION” error. All you have to do is open Command Prompt as an administrator and then execute each one of the following commands sequentially to flush the DNS cache:

• ipconfig/release
• ipconfig/renew
• ipconfig/flushdns

Option 3 – Try turning off the airplane mode via System settings

If flushing the DNS cache did not help in fixing the problem, then you might want to turn off airplane mode via system settings.

• In the Windows Search bar, type “airplane mode”.
• From the search results that appear, click on Airplane mode.
• After that, a window will appear where you have to turn off the toggle button for Airplane mode.

Option 4 – Try to update, rollback or reinstall the Network adapter drivers

The next thing you can do to resolve the problem is to update the Network Adapter drivers by following these steps:

• Tap the Win + R keys to launch the Run window and then type in the “devmgmt.msc” command and hit Enter to open the Device Manager window.
• Under the Device Manager, you will see a list of drivers. From there, look for the Network Adapters and expand them.
• Look for the Broadcom Network Adapter and right-click on it, as well as other network adapters that have an exclamation icon, and update them all.
• Restart your PC and see if it helped in fixing the problem.

Note: If updating the network drivers didn’t help in fixing the problem, you can also try to roll back the very same drivers from their previous versions and restart your Windows 10 PC. After that, the system itself will reinstall the drivers you just uninstalled. Alternatively, you can also download and install the drivers from the manufacturer’s website directly. To reinstall the network adapter drivers, refer to these steps:

• Open the Devices Manager from the Win X Menu.
• Then locate the device drivers and right-click on them to open the Properties.
• After that, switch to the Driver tab and click on the Uninstall Device button.
• Follow the screen option to completely uninstall it.
• Finally, restart your computer. It will just reinstall the device drivers automatically.

Option 5 – Try to turn off the physical switch for Airplane mode

If your computer has a physical switch to turn on or off the airplane mode, then you might want to check that switch if you have one. Chances are, it could be the reason why you’re unable to turn off Airplane mode on your computer.

Option 6 – Try to make some adjustments in the Registry

• Tap the Win + R keys to launch the Run utility.
• Then type “Regedit” in the field and hit Enter to open the Registry Editor.
• Next, navigate to this registry path: HKEY_LOCAL_MACHINESystemCurrentControlSetControlClass
• From there, edit the registry value of “RadioEnable” to “1”.
• Exit the Registry Editor once done, and restart your computer.

If you were trying to open File Explorer but it suddenly stopped working and you encounter an error message that states, “An attempt was made to reference a token that does not exist”, read on as this post will guide you in fixing this problem. This problem was initially reported after the April Update and Microsoft was able to fix it right after correcting the build. However, this effort seems futile for some users as recently, some reported getting the same error when they try to open not just Windows File Explorer but also with utilities like Microsoft Management Console or MMC, Visual Studio, Task Manager, Printer, Recycle Bin, etc. Two of the most likely causes of this error are a troublesome Windows Update and corrupted system files. Whatever the cause is, here are some suggestions you can follow to fix the “An attempt was made to reference a token that does not exist” error.

Option 1 – Try to re-register the problematic DLL file

You may have to re-register the ntdll.dll file using the regsvr32.exe before you can successfully install the program and fix the ntdll.dll file crash error. The Regsvr32 tool is a command-line utility that can be used to register and unregister OLE controls like DLL and ActiveX (OCX) control in the Windows operating system. Follow the steps below to use it.

• Open Command Prompt as admin from the WinX menu.
• Next, type the following commands in the elevated Command Prompt and hit Enter to execute the command. This will re-register the affected DLL file using the Windows operating system tool, regsvr32.exe.
  • exe /[DLL file]
  • exe [DLL file]

Note: Replace “[DLL file]” with the name of the DLL file that was pointed out in the error.

• After you execute the given commands, you should see a message saying, “DllRegisterServer in vbscript.dll succeeded” if the Regsvr32 tool was able to run successfully. After that, try to install the program again and see if it now works.

Option 2 – Replace the DLL file from a trusted source

• First, you need to get the new DLL file from another computer with preferably the same file version number.
• After that, you need to boot your PC into Safe Mode and navigate to the paths listed below and then replace the file using a USB drive or other external storage devices.
  • x86: This PC > C:/Windows/System32
  • x64: This PC > C:/Windows/SysWOW64
• Next, type “cmd” in the Cortana search box and right-click on Command Prompt, and select “Run as administrator” to open it with administrator privileges.
• Now type the “regsvr32 ntdll.dll” command and hit Enter.
• Restart your PC and check if the error is now fixed.

Option 3 – Perform a System File Checker scan

The System File Checker or SFC scan could detect and automatically repair damaged system files that could be causing the “An attempt was made to reference a token that does not exist” error to pop up. SFC is a built-in command utility that helps in restoring corrupted files as well as missing files. It replaces bad and corrupted system files with good system files. To run the SFC command, follow the steps given below.

• Tap Win + R to launch Run.
• Type in cmd in the field and tap Enter.
• After opening Command Prompt, type in sfc /scannow and hit Enter.

The command will start a system scan which will take a few whiles before it finishes. Once it’s done, you could get the following results:

1. Windows Resource Protection did not find any integrity violations.
2. Windows Resource Protection found corrupt files and successfully repaired them.
3. Windows Resource Protection found corrupt files but was unable to fix some of them.

Option 4 – Try reverting back to the previous build of Windows

This kind of error might have something to do with a Feature Update so you can try to revert your computer to a previous build of Windows 10 as it could help you fix the problem. In this case, it would better if you refrain from updating your Windows 10 computer until this problem is completely resolved by Microsoft.