How to Fix Error Code 0xC004C770

Code 21 - What is it?

Code 21 is a Device Manager error code that appears when you try to use a hardware device attached to your computer and the Windows prohibits you from using it.

This is due to the Windows experiences problems loading the device driver. This error message is displayed in the following format:

“Windows is removing this device. (Code 21)”

Solution

Error Causes

Error code 21 means that Windows is in the device removal process and the device has not been completely removed. It occurs when you set a device to be removed and then select the same device to run on your system.

Upon your instructions, Windows start to remove that device and when you on the other hand try to use/access the same device that you selected for removal, it kicks up Code 21.

Further Information and Manual Repair

If you are experiencing error code 21 on your PC, it is advisable to resolve it immediately.

Though this error will not damage your system, but will significantly lower the performance of your PC which is definitely something you don’t want especially if you work on your computer daily and use it to perform important time-sensitive errands.

To repair and resolve, try the methods given below:

Method 1 - Wait for a Few Seconds and Then Press F5

This is one of the best and easiest ways to resolve code 15 on your system. Wait for a few seconds, and then press the F5 key. This will update the Device Manager view and the error will most probably go away.

Method 2 - Restart Your PC

Sometimes error codes may pop up due to temporary glitches. To resolve such errors, a simple reboot of your PC is enough. Shut down Windows and then restart your system.

This is most likely to resolve Code 21. However, if the error still persists then this means the underlying problem for code 21 is deeper than you think. Try method 3 to resolve.

Method 3 - Install DriverFIX

As mentioned earlier, the error code 21 may occur if you have selected a device to remove and then you try to reuse it.

To resolve, you may have to install the device again and the driver for that the reinstalled device. To reinstall the driver without any hassle, simply download DriverFIX.

It is a smart, user-friendly, and intuitive software program designed to resolve driver problems. The program is embedded with intelligent device identification technology which:

• Automatically detects all the appropriate system drivers
• Matches them with the latest available versions
• And then updates drivers according to their compatible versions on a regular basis

Furthermore, it enables accurate installation and ensures that your system is running at its optimal speed.

Other features that this program boasts are full backup and restoration, safe USB management, and ejection.

If nothing works, you can try the full backup and restoration feature and restore your PC to its previous state when it was functioning properly before the error occurred.

DriverFIX creates a backup of all your files and data hedging keeps you from disasters like data loss. It restores the system to the time when it was working properly.

Click here to download DriverFIX on your system and resolve error code 21 today.

Windows PowerShell is a powerful tool inside the Windows environment often overlooked by typical users which is a great mistake since it can offer a large array of functionality and usability and if used well can offer a unique working experience. Today we will be using PowerShell to turn the WEB camera off so it can not be accessed, completely disabling it for use. You might want to do this for security reasons or just want to learn few new things. Whatever your reason might be, I am welcoming you to this tutorial and please do keep reading.

Finding device ID

In order to disable the WEB camera first thing we need to do is to find a matching device ID. We will find this value inside the device manager, so press ⊞ WINDOWS + X to open the secret menu. In the menu choose device manager and click on it. When the device manager opens, expand the Imaging devices or Cameras section. Right-click Integrated Camera or the primary webcam, and click Properties. Go to the Details tab. Under the Property section, click to select Matching device ID from the drop-down. Right-click the value and select Copy The next step is to download and install Windows Driver Kit (WDK)

PowerShell script

Create and run a PowerShell script with the following parameters/values to disable the camera. Substitute the <FOLDER> placeholder with the actual name of the folder where your copy of Devcon is residing

$id = (Get-CimInstance Win32_PnPEntity |

where caption -match '<PRIMARY CAMERA>').pnpDeviceID

$ppid = "{0}{1}" -f '@',$id

Set-Location c:\<FOLDER>

Devcon status $ppid

Devcon disable $ppid

Devcon status $ppid

To enable the camera device, run the command below in PowerShell:

devcon enable $ppid

This post will walk you through fixing the rtwlane.sys Blue Screen error. This kind of BSOD error belongs under the category of the “DRIVER IRQL NOT LESS OR EQUAL” Stop errors. If you encounter this kind of Stop error then it means that a kernel-mode driver tried to access pageable memory at a process IRQL that was too high. The main issue with the rtwlane.sys Blue Screen error has something to do with the Realtek PCI-E Wireless LAN PCI-E NIC driver. In other words, it has some issues with the wireless card of your computer which is built by Realtek. And since it this error concerns your wireless card, you might also experience some connectivity problems with your computer as the wireless card refuses to find any network connections and even randomly disconnects. To resolve this problem, you need to refer to the given options below.

Option 1 – Run the Blue Screen Troubleshooter

The Blue Screen troubleshooter is a built-in tool in Windows 10 that helps users in fixing BSOD errors like rtwlane.sys Blue Screen error. It can be found on the Settings Troubleshooters page. To use it, refer to these steps:

• Tap the Win + I keys to open the Settings panel.
• Then go to Update & Security > Troubleshoot.
• From there, look for the option called “Blue Screen” on your right-hand side and then click the “Run the troubleshooter” button to run the Blue Screen Troubleshooter and then follow the next on-screen options. Note that you might have to boot your PC into Safe Mode.

Option 2 – Try to update or rollback your Network driver

If you have updated the driver software as of late and you suddenly got this BSOD error, you might have to roll back the device driver – in other words, switch back to the previous working version. To do that, follow these steps:

• Tap the Win + R keys to launch the Run window and then type in the “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 it.
• From the list of Network Drivers, look for “Realtek <Model> Wireless LAN 802.11n PCI-E NIC” and then right-click on it and select Update Driver.
• Restart your PC and see if it helped in fixing the BSOD error.

Note: If you see any of the following entries under the Network drivers, you might want to download their latest available versions from each one of their manufacturer’s websites.

• Realtek High-Definition (HD) Audio Driver
• Realtek Card Reader Driver
• Realtek Local Area Network (LAN) Driver

On the other hand, if updating the Network driver didn’t help, you can also try to roll back to its previous version.

• Open the Device Manager again and then look for Network Drivers.
• Next, select Realtek <Model> Wireless LAN 802.11n PCI-E NIC from the list of Network Drivers and then double click to open a new mini window.
• After that, make sure that you’re on the Driver tab and if you are not, just navigate to it then click the Roll Back Driver button to switch back to the previous version of the Realtek driver.
• Now restart your computer to successfully apply the changes made.

Option 3 – Try running the System File Checker Scan

The SFC or System File Checker scan could detect and automatically repair damaged system files that could be causing the Netwtw04.sys failed BSOD error. 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

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.

Error code 10, device manager code occurs when Bluetooth or Wi-Fi cannot be enabled. Inside device manager beside device would be yellow exclamation sign and if you go into device properties status would be: This device cannot start. Following are proven solutions that will resolve the issue and provide you with a working device.

Reboot PC, check for switch

This simple solution can usually work in most cases, first thing is to check if by any chance hardware switch for Wi-Fi or Bluetooth is OFF (laptops have a small switch that can turn the device On or OFF), then if you do not have a switch or you made sure it is ON, reboot your system.

Run Network Adapter Troubleshooter

If previous simple step solutions have not proven to be effective run Network Adapter Troubleshooter

1. Press WINDOWS + I to open settings
2. Go to System > Troubleshoot > Other troubleshooters
3. Inside Find Network Adapter
4. Click on Run to start the troubleshooters

Disable and then re-enable Adapter

If the previous solution has not fixed the issue try disabling the adapter and then re-enabling it back.

Update network adapter

Go to the intel website and download the latest driver package. After the download is finished install the latest driver.

Turn ON the WLAN AutoConfig service

1. Press Windows key + R to invoke the Run dialog.
2. In the Run dialog box, type services.MSC and hit Enter to open Services.
3. In the Services window, scroll and locate the WLAN AutoConfig service.
4. Double-click on the entry to edit its properties.
5. In the properties window, click the drop-down on the Startup type and select Automatic.
6. Next, make sure the Service status is started and running.
7. Click Apply > OK to save changes.
8. Exit Services console.
9. Restart PC.

Page Fault in Non-Paged Area is a blue screen error usually happening with faulty drivers but it can come from different issues like faulty RAM. In this short article, we will cover usual ways on how to approach and solve this error.

Solving Page fault in Non-Paged Area

Rollback using system restore

Simple and easy solution, roll back to the previous system restore point where Windows was stable and working.

Fix Page Fault in Non-Paged Area using device manager

1. Press ⊞ WINDOWS + X to open the hidden menu
2. Click on device manager
3. Find a device with a question mark and right-click on it
4. Click on the rollback driver button

Fix via command prompt

1. Press ⊞ WINDOWS + X to open the hidden menu
2. Click on command prompt (admin)
3. Inside command prompt type in SFC / scannow and press ENTER
4. Wait for the process to be finished and then reboot the PC

Fix via DISM tool

1. Press ⊞ WINDOWS + X to open the hidden menu
2. Click on command prompt (admin)
3. Inside command prompt type in DISM /Online /Cleanup-image /Restorehealth and press ENTER
4. Wait for the process to be finished and then reboot the PC

Page fault in Non-Paged Area via a dedicated tool

Sometimes manual and provided solutions just simply cannot cut it because the issue is triggered also with something else and not just a single issue. Use DRIVERFIX to fix this specific issue with a single click.

Steam Deck release is almost upon us and more news comes to light. The Latest officially confirmed technical detail is that the user will have access to device's BIOS and that dual booting will be officially supported. This, of course, means that you will be able to have both Proton and Windows on your device letting you play anything that you wish if the hardware is strong enough. Valve also said that you can launch OS from an SD card! This of course will save space available for games themselves, especially for entry models with less than one available. All of this information really pushes Deck into the territory of a handheld PC and not just another console and I must admit that this announcement left a smile on my face.

If you were trying to print some documents but encounter the HIDCLASS.SYS Blue Screen error instead, then you’ve come to the right place as this post will guide you in fixing any Blue Screen errors related to the HIDCLASS.SYS file. HIDCLASS.SYS is a Windows operating system driver file. HID or Human Interface Device includes Keyboards, mice, and other input devices. HIDCLASS.SYS is a critical system driver file that is responsible for connecting different kinds of devices all over the system, including the functionality where a Word Processor can access the printer to print documents. This file comes under the category of kernel-mode device drivers and if the driver fails, it can result in a Stop Error. There are a lot of Stop errors related to the HIDCLASS.SYS file, such as:

• KMODE EXCEPTION NOT HANDLED
• SYSTEM SERVICE EXCEPTION
• DRIVER POWER STATE FAILURE
• PAGE FAULT IN A NONPAGED AREA
• SYSTEM THREAD EXCEPTION NOT HANDLED
• DRIVER VERIFIER IOMANAGER VIOLATION
• IRQL NOT LESS EQUAL

The fixes for the Blue Screen errors related to the HIDCLASS.SYS files are pretty simple but before you troubleshoot the problem using these fixes, make sure that you boot your computer into Safe Mode with Networking first. After that, get started on these tips:

Option 1 – Update or rollback or disable concerned device drivers

To fix the HIDCLASS.SYS error, you can also try to roll back, or update, or disable the concerned device drivers.

• Open the Devices Manager from the Win X Menu.
• Then locate the device drivers particularly the ones that are under the sections of Keyboard, Mouse, USB, and HID Drivers.
• Next, 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.

Note: You can install a dedicated driver on your computer in case you have it or you could also look for it directly from the website of the manufacturer. On the other hand, if you have just updated your device drivers then you need to roll back the drivers to their previous versions or disable them.

Option 2 – Check for any incompatible devices

The next thing you can do to troubleshoot the HIDCLASS.SYS Stop error is to plug in and out each one of the different hardware that is connected to your computer. Doing so will help you determine which one of the hardware is the one that’s triggering the error to pop up. You will also know what hardware drivers or anything else that could be causing this error which includes external devices like mouse, keyboard, printer, as well as internally attached components like the Graphics card and so on.

Option 3 – Try running the ChkDsk utility

Running the ChkDsk utility can also help you resolve any Blue Screen errors related to the HIDCLASS.SYS file. To run this tool, refer to these steps:

• First, open This PC and right-click on your operating system partition for Windows.
• Next, click on Properties and navigate to the Tools tab.
• Then click on Check under the Error Checking section.
• After that, a new mini window will be opened and from there click on Scan drive and let it scan your disk drive partition for any errors and then restart your computer.

Option 4 – Try checking the Memory for any errors

• Tap the Win + R keys to open Run and type exe and hit Enter to open the Windows Memory Diagnostic Tool.
• After that, it will give two options such as:
  • Restart now and check for problems (Recommended)
  • Check for problems the next time I start my computer
• Once your computer has restarted, perform a basic scan or you could also go for the “Advanced” options such as “Test mix” or “Pass count”. Simply tap the F10 key to start the test.

Note: After you select the option, your PC will restart and check for memory-based issues. If it finds any issues, it will automatically fix them.

Option 5 – Run the System File Checker

System File Checker or 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.

• Type “cmd” in the Start search and then right-click on the appropriate search result.
• Next, select “Run as administrator” to open Command Prompt with admin privileges.
• After opening Command Prompt, type in sfc /scannow

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.

• Now restart your computer and see if the Blue Screen error is fixed or not.

What is Error 0xc0000142?

Error 0xc0000142 can occur in any of the Windows versions and usually occurs when an application fails to properly initialize.

This error can be critical for a computer as it signifies that the system is unstable. Error 0xc0000142 can cause slow performance in a PC, system freeze, startup and shutdown issues, blue screen and errors in installation.

Solution

Error Causes

Windows/Application Error 0xc0000142 can occur because of a number of reasons.

When a computer is an overload with data, or when system files get broken or missing, this error can occur and will result in startup and shutdown issues as well as the blue screen. Another reason, and one which is quite common, is improper computer maintenance.

This will cause a PC to perform slow, system freezes, and installation errors. This error displays ‘failed to initialize’ on either a Windows error box or the blue screen of death.

Further Information and Manual Repair

Error 0xc0000142 can occur at any time, but there are many ways to resolve it. For instance:

1) Clean the Registry

A corrupted registry is one of the major reasons why this error occurs. The registry is used by Windows to store information and settings on the computer, which is why it has a large database.

This database contains emails, wallpapers, saved passwords and much more in ‘file path references’. These allow Windows to run the common files in your system. A registry cleaner can fix any errors in the registry database.

2) Malware Scan

Viruses can cause certain applications to not function properly. Hence, download a strong antivirus and run a deep scan on your system and remove any potential infections and spyware.

3) Reinstall Applications

Non-critical applications in a computer are those that are installed by the user. If error 0xc0000142 displays in any of your installed programs, then you should reinstall these programs. Often applications have damaged or corrupted files which can slow them down. To resolve this, follow these steps:

• From Start, click on Control Panel
• Go to Add/Remove Programs and uninstall the programs
• Restart your PC and reinstall the program

The third step is not recommended in case the error is caused by cmd.exe

4) Repair Windows

If the error is still on display despite following the previous steps, then you can repair Windows. This process allows Windows to retain all your data and information by simply replacing the program files and settings with fresh ones. This can stop error 0xc0000142 by allowing the programs access to use necessary files smoothly and effectively.

If you cannot resolve the error in any of these steps, then there is another way to do so if you have a computer that runs the Microsoft Internet Security and Acceleration (ISA) Server 2000. Follow these steps in order to resolve it:

• Make sure that in Program Files and Microsoft ISA Server, a Clients folder exists. The ISA Server service will run on this folder
• Confirm that Administrators and SYSTEM have Full Control assigned in the Program Files/Microsoft ISA Server/Clients folder
• Confirm that Msplat.txt file is in the Clients folder. You can copy this file from other ISA Server computers if it is missing
• If the Clients folder is damaged or is missing, or if you can’t copy the Msplat.tct file from another ISA Server computer, then reinstall the ISA Server 2000

As you know, Windows programs depend on several operations to get executed and at the same time, there are also numerous parameters that have to be fulfilled for a program to get executed. However, based on some reports, there was an error when some users tried to run a program. This error says, “The application was unable to start correctly (0xc00007b)”. There could be various reasons why this error occurs but the main one is most likely due to an x86 application that is not compatible with the x64-based operating system. To fix this problem, you can run the Check Disk utility or reinstall the application or the Microsoft .NET Framework. You can also try reinstalling DirectX or replace the corrupted DLL file(s). For more details, refer to the given options below.

Option 1 – Try running the Check Disk utility

• In the Windows Search box, type “command prompt” and from the search results, right-click on Command Prompt and select “Run as administrator”.
• After opening Command Prompt, type this command and tap Enter: chkdsk <Partition Letter>: /f
• The command you entered will start to check for errors and fix them automatically. Else, it will throw an error message saying, “Chkdsk cannot run because the volume is in use by another process. Would you like the schedule this volume to be checked the next time the system restarts? (Y/N)”.
• Tap the Y key to schedule Disk Check the next time your computer restarts.

Option 2 – Re-enable the Microsoft .NET Framework

You could also try to disable the Microsoft .NET Framework then enable the latest version of the .NET Framework on your PC and check if the error is fixed

Option 3 – Try to reinstall the program

There are times when some supporting module for your application under the hood could have messed up the application where you get the error. To fix this, you have to uninstall the program and then download its latest version from its official site and then install it again. Once you’re done, run the application and see if the error is fixed.

Option 4 – Run System File Checker scan

If reinstalling the program didn’t work, you can also try running the System File Checker or SFC scan to fix the error. System File Checker is a command utility built into your computer that helps restore corrupted files and missing files. Refer to the following steps to run it:

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

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.

• Reboot your computer.

Option 5 – Try running the DirectX Diagnostic Tool

Since the error has something to do with the DirectX Graphics APIs, you can run the DirectX Diagnostic tool to resolve the problem.

Option 6 – Try updating or re-installing DirectX

If the DirectX Diagnostic tool didn’t work, you can try to update or reinstall DirectX instead. This can help in fixing the problem because when you reinstall or update DirectX, it will replace the incompatible or corrupted components of DirectX from your computer.

Hello everyone and welcome to another great tutorial from errortools.com I hope everyone is feeling great and that you are prepared to boost the performance of your computer. This time we will speed up Windows startup time and overall performance by eliminating startup programs that we don't need and do not use. Microsoft itself and some application developers tend to have some applications or some services always active and set to be loaded on Windows startup. If you want to change which of these applications are starting up with your Windows and change them, follow this easy guide and you will be speeding up your Windows in no time. First thing is to open a task manager, fastest and most direct way of doing this is with a keyboard combination of CTRL + SHIFT + ESC When Task Manager opens, click on the startup tab on top. Once you click on startup you will get a list of applications that are set to be started when Windows is booted. You can now click on the application and then click on disable on the bottom button, the application status will update in task manager to disabled and it will not be booted anymore when Windows starts. In this same manner, you can enable back some applications if you changed your mind about them. Please note that some applications are using some services and must have them running or they will not work properly. The best practice is to disable applications you are positive you will not use or use rarely so you do not want them to slow down Windows.