TPM 2.0 and Windows 11, all you need to know

Error Code 0xC1900101, 0x30018? - What is it?

Users, when upgrading to Windows 10 from Windows 7 or Windows 8/8.1, or when upgrading to a new version, build, service pack, or major update of Windows 10, can encounter error code 0xC1900101, 0x30018. Windows 10 installation fails and stops or hangs. During the installation process, it will reach a certain maximum limit (normally at 6% or 32%) then reverts back to the previous version of the operating system and displays the following message:

We couldn’t install Windows 10. We’ve set your PC back to the way it was right before you started installing Windows 10.

0xC1900101 – 0x30018 The installation failed in the FIRST_BOOT phase with the error during the SYSPREP operation.

Solution

Error Causes

In attempting to fix Error Code 0xC1900101-0x30018, it is vital to know what causes this issue. The most probable causes of this error are:

• Incompatible hardware or driver
• Incompatible security programs or antivirus or incompatible utility software
• A device driver possibly stopped responding to setup.exe while on the installation process.

In some cases, you might be opened to other error messages when attempting to update to Windows 10, including error code 8007002c.

Further Information and Manual Repair

In fixing issues related to error codes, it is best to employ manual repair methods. Using these methods helps users pinpoint the root causes of the issue and apply solutions permanently to fix the issues. While most manual repair methods can be done by every Windows user, even those without technical abilities, there are certain cases where help from a Windows professional is needed. If you’re not up to facing risks in implementing manual methods yourself, consider getting help from a professional Windows technician or you can use a powerful automated tool. In fixing Error Code 0xC1900101-0x30018, you can repeat the same steps used for 0xc000021a (Method One) or you can try doing the following:

• Disable or uninstall your Antivirus program before proceeding to upgrade the system
• Ensure that the machine name is simple (having at least 8 characters) with no special characters like hyphens or dashes.
• Restart the device a few times then try again.
• Disable General USB Devices such as the Smart Card Reader.
• If you use an SCSI hard disk, ensure that you have available drivers you can use for your storage such as a thumb drive and make sure that it is connected. During the Windows 10 setup, select the Custom Advanced Option and use the Load Driver command to be able to load the suitable driver for the SCSI drive. If this fails, try switching to an IDE-based hard disk.
• You can now perform a clean boot. Restart your device then try again.
• If you are using the .ISO file for upgrading the system, you need to disconnect from the Internet first before proceeding to the setup. If you are connected to Wi-Fi or by Ethernet (LAN), make sure to disable both connections then you can proceed to set up again.
• If you’re performing the update through Windows Update, once the download reaches 100%, disconnect from the Internet, and then proceed with the installation.

NOTE: If this fails, if possible, you can try using the .ISO file in upgrading.

• Switch to a local account if the device is connected to a domain.
• Disconnect all external devices attached to the computer such as gaming controllers, printers, or USB keys.

If you’re using Windows Update in installing Windows 10, you can implement the following:

1. Open the Command Prompt window by pressing Windows Key + X. Select Command Prompt (Admin) from the menu.
2. Stop the BITS, Cryptographic, MSI Installer, and the Windows Update Services. In order to do this, Type or Copy and Paste the following commands one at a time:

NOTE: Don’t forget to hit Enter after every command.

net stop wuauserv

net stop cryptSvc

net stop bits

net stop msiserver

3. Rename the Catroot2 and SoftwareDistribution In order to do this, Type or Copy and Paste the following commands one at a time:

NOTE: Don’t forget to hit Enter after every command.

                        ren

C:WindowsSoftwareDistribution SoftwareDistribution.old

                          ren

C:WindowsSystem32catroot2 Catroot2.old

4. Restart the BITS, Cryptographic, MSI Installer, and the Windows Update Services. In order to do this, Type or Copy and Paste the following commands one at a time:

NOTE: Don’t forget to hit Enter after every command.

net start wuauserv

net start cryptSvc

net start bits

net start msiserver

5. Type Exit in the Command Prompt then close the Command Prompt window then restart the computer.

Can’t seem to put up with the long and technical manual repair process? You can still fix this error by downloading and installing a powerful automated tool that will surely get the job done in a jiffy!

Hello and welcome to our Business Email Etiquette. Most people have experience in writing emails at some point before in their lives. However, the emails an average person writes are probably personal emails and not mails for work purposes. Emails you send to friends are incredibly different in content and context to business emails you would send to customers or employers or even other colleagues in your workforce. So, if you have a job that involves you writing emails to people in business style, learning business email etiquette is an absolute must for you.

 1. Heading layouts

When you are sending emails to friends, you generally lay them out like a memo. This means there is very little detail in the layout besides basic greetings and paragraphs, usually starting with the greetings. However, with a business email, it is best to lay it out exactly like you would lay out a formal letter. You need to put the company’s address in the right-hand corner and the date as well. Only then must you go on to the greetings. This will make your email look more formal, making you seem like a professional who knows what they are doing as opposed to someone who just couldn’t be bothered spending the extra time to get the layout right.

 2. Proper greetings

 When you are sending an email to a friend, you usually greet them informally. If their name was Mary Johnson, you’d probably start your letter with a ‘Hey Mary’ or a ‘Hello Mary.’ However, this is not considered a professional way to write an email to a customer or other important person in your business. Again, you must use the proper method that you would greet someone with were you writing them a formal letter instead. If your customer is Mary Johnson again, you should greet her with respect. ‘Dear Ms. Johnson’ would be the most appropriate way to start off your letter’s actual body in this case. If you do not know the recipient’s name, then you should start with a simple ‘Dear Sir or Madam.’ Politeness will always get you incredibly far, no matter what line of work you are in.

 3. Informal language

 You should get straight to the point with your email. Don’t dawdle on with it like you would if chatting to a friend and don’t write it how you would speak either. You use language that sounds impressive and smart while not using such obscure language that your recipient doesn’t know what you are saying. All the time, you must keep it informal where possible, possibly even impersonal as well. It will make you seem very professional in the long run.

 4. Signing off

When you are sending your email, you must end it as you would with a letter also. Don’t just say ‘Bye’ and your first name; that is too personal. You need to say ‘yours sincerely if you know the name of the recipient and ‘yours faithfully’ if you do not. Then you should end with your full name and whatever position you have at the company. (CEO, technical staff etc.) So there you have it! All you need to do now is to show your boss that you can handle the emails from now on!

On September 18th, 2017, Cisco’s Talos announced that CCleaner, a popular utility with billions of worldwide users, had been compromised by hackers, and was used to unwittingly distribute hidden malware in its installer. Later in the day, Piriform, the publisher of CCleaner, confirmed the problem.

Undetected by all but 1 major antivirus including CCleaner’s own parent company, this occurred for over a month and impacted over 2.7 million users. Users of CCleaner v5.33.6162 and CCleaner Cloud v1.07.3191 for 32-bit Windows are affected. These downloads were live on CCleaner’s official site from August 15th to September 12th, 2017. Anyone who downloaded the program during this time could be affected. The company claims that while the hackers set up the backdoor and many users were impacted, that the perpetrators have been arrested and that the malware never successfully performed its full task and compromised user’s PCs or sent out their data; in the wake of recent security breaches such as Equifax, users are understandably worried. Given the severity of the threat of hacking and data theft, users should take action immediately if they have CCleaner.

Technical Details of CCleaner Malware Injection

First reported by Talos, the malware, which was hidden in the CCleaner installer without the publisher noticing (despite them being owned by Avast, a massive Anti-virus company), modified a core program DLL file to evade detection, and creates several registry keys. Not only were these files not flagged by any major Anti-Virus, but they were also even digitally signed by Piriform via their Symantec certificate, meaning your PC and security program would likely whitelist and trust the malicious installer. The malware gathers personal information on a user’s PC, including IP address and running programs, and sends it to a remote server. In our testing, the program sent data to IP 216.126.225.148.

Restore Your PC (If Possible)

As of the publication of this article, there have been no assurances given that updating or even uninstalling CCleaner will remove the malware is installed. The only action thus far has been shutting down the remote server where user data was being sent has been shut down by authorities. For this reason, it is best to remove the underlying malware separately, as its presence represents a serious security threat. Unfortunately, as this could have been installed as far back as August 15th, 2017, your System Restore points may not go back that far, or even if they do, restoring to such an outdated point may cause unintended problems with other programs you use and potentially lost files and data. Manually backing up files and doing a full format or clean Windows installation would likely be successful in fully removing the malware, but is extremely time-consuming and can be difficult for many PC users. Unfortunately, this makes a PC Restore or format an unattainable option for many.

Update CCleaner to the Latest Version

While CCleaner has told users to update to the latest version of the program. Prior to doing so, we recommend fully uninstall CCleaner, ensuring you check its program files folders and registry keys, manually deleting any remnants, and then re-downloading the latest version from the official site and reinstalling clean.

There are instances when you open a picture or an image in the Windows Photo Viewer and instead of displaying the image, it displays nothing and you’ll see an error message instead that says, “Windows Photo Viewer can’t display this picture because there might not be enough memory available on your computer”. Although this may look like a clear-cut issue of less storage space or low RAM in your computer, that’s not always the case. Security experts noticed that even when your computer has enough resources and disk space, this kind of problem could still occur. So if you experience the same thing, you need to check the Color Profile of your screen. For more information, refer to the detailed instructions provided below but before you proceed, make sure that you close some processes in the Task Manager or restart your computer and see if it helps in fixing the problem. You can also try using the Disk Cleanup tool. To use it, refer to these steps:

• Tap the Win + R keys to open the Run dialog box and then type “cleanmgr” in the field and hit Enter to open the Disk Cleanup window.
• After that, select the drive you want to clean.
• Now click OK to clean the disk and restart your computer.

If the Disk Cleanup tool didn’t help in resolving the issue, refer to the instructions below. Step 1: In the search box, type “color management” and then select the “Change advanced color management settings for display” option from the search results. Or you could simply go to Settings > System > Display, Advanced display settings, and from there, select display and click on the Display adapter properties of Display. Step 2: Next, switch to the Color Management tab and click on the Color Management button. Step 3: Select the monitor where you’re getting the “Windows Photo Viewer can’t display this picture because there might not be enough memory available on your computer” error in the next window. And if you have two displays, make sure that you select the primary display. You also have an option to identify the monitor. Step 4: Once confirmed, select the “Use my settings for this device” checkbox. Step 5: After that, select the Profile listed under the “Profiles associated with this device” option and then click on Remove. Step 6: Next, go to the Advanced tab and make sure that all settings are set to System default which includes a device profile, perceptual images, rendering intent, Relative Colorimetric, and many more. Step 7: Once you’re done, you have to restart your computer and then try to open the same image you were trying to open earlier and then check if you can now open it instead of seeing the error.

This Unresponsive Script problem information is most frequent on Firefox, which is among the top browsers worldwide. Firefox might show you these errors with the information, "Warning: Unresponsive Script". It is going to subsequently inform you that software to the web page you're trying to open is unresponsive, or has quit reacting. This means that the script has ceased functioning and may freeze or hang Firefox if not immediately resolved. You can easily solve this problem.

Solution

Error Causes

Before you can fix this error, you need to understand its primary cause. The biggest risk is that if left unchecked, Unresponsive Scripts will hang your browser and to an extension of your computer thus limiting your productivity. You may have to uninstall and re-install Firefox if the problem persists. Listed here are several of the very most typical reasons for unresponsive script:

• Programming Errors
• Interference by other Softwares
• Using an older outdated version of the program.

Further Information and Manual Repair

Most times, you have to do very little to fix this problem. Furthermore, a lot of the remedies supplied here do not require the assistance of a qualified professional technician. You can easily perform them and completely solve the error.

• If you wish to stop the error, keep your browser and add-ons up to date.

It's easy to update your browser and any add-ons therein. In most cases it's free. By upgrading your browser and add-ons frequently, you are effectively eliminating the risk of Unresponsive Script occurring and interfering with your work.

• Check for a poorly functioning background process

The sorts of background procedures that might result in the Unresponsive Software error include Javascript code, media plugin, and browser extension. You can stop the script from running while using Firefox thus eliminating the Unresponsive script error. Shutting the dialog box is just another easy way of eliminating the unresponsive script error information. Firefox offers you two choices in case of this malfunction. Either "Continue" or "Stop Script". Whatever alternative you pick, you can be certain the dialog box shuts, thus allowing you to continue browsing. The final solution. Contact Firefox about these errors on your browser. Oftentimes, these errors occur when you attempt to visit particular websites. Mark the offending websites' URLs and include them in your communications with Firefox. Sometimes you can also contact the website owner yourself and request them to check their website's code. Following are additional measures you can take to resolve the Unresponsive Script error.

• Waiting longer for the error to resolve itself automatically
• Blocking the offending script
• Yanking the guilty add-ons
• Disabling the hardware acceleration tool.

With one of these few steps, you won't have to worry about the Unresponsive Script error, can continue enjoying your browsing activities on Firefox.

If your Microsoft Edge browser encountered a Stop Error that says, “INVALID_POINTER_READ_c0000005 (atidxx64.dll)” in your Windows 10 computer, then this indicates that your Graphics card driver is outdated. According to security experts, Microsoft has already acknowledged the problem and stated that this issue exists with Windows 10 v1809, Windows Server 2019, and Windows Server version 1809. Although there is no direct way to resolve the problem, there are still some workarounds you can try. If you are using a RadeonHD2000 or HD4000 series video card, the update will be blocked for you. Some users also claim to experience performance issues with the lock screen or the ShellExperienceHost. However, if you are using AMD, the problem is that it no longer supports Radeon HD2000 and HD4000 series graphics processing units or GPUs. Even though Microsoft is already working for a way to resolve the problem, here are some alternative solutions you can check out:

Option 1 – Update your Graphics card drivers

• First, boot your computer into Safe Mode.
• After that, tap the Win + R keys to launch Run.
• Type in devmgmt.msc into the box and tap Enter or click OK to open the Device Manager.
• After that, a list of device drivers will be displayed. From there, look for the Display Adapters and click on them.
• After that, right-click on each entry under the Display Adapters and select the “Uninstall Device” option from the menu.
• Now restart your computer.
• After restarting your computer, go to the Settings app and Check for Updates in the Windows Update section.

Note: You also have the option to go directly to the website of your graphics card manufacturers like NVIDIA, Intel or AMD and go to the section called Drivers then check if there’s a new available update – if there is, download and install it.

Option 2 – Try removing AMD Radeon HD2000 and HD4000 drivers

Although this is not exactly a perfect solution, removing AMD drivers will make the operating system fall back to the default GPU available on your motherboard. You also have the option to completely disable the hardware.

• Tap the Win + X + M keys to open the Device Manager.
• Next, look for your Graphics card drive, and under Display Adapters, right click on them and click Uninstall device or Disable device.
• After that, restart your computer. This will disable the AMD drivers so you won’t be able to find them. It will also release the Windows 10 v1809 update on your computer and in case your operating system tries to prompt you with the “New Device found” message, simply ignore it.

Option 3 – Try to use another browser

You might want to use another browser especially when you already updated your computer and Microsoft Edge still keeps on crashing. You can use Google Chrome, Mozilla Firefox, and other browsers as alternatives until you sort out the problem.

Option 4 – Try to remove the Graphics card physically

You might also want to try removing both AMD Radeon HD2000 and HD4000 as they are very old graphics cards. And since AMD is not going to roll out anything, at least on its own if your motherboard has an onboard GPU, it would be best to get rid of the cards. After that, install the Windows v1809 update and then put them back in. You also have the option to install the driver but just don’t use Microsoft Edge.

There are not many applications for creating mind maps, even fewer that are completely free, so it is with great pleasure to present you with Freeplane. Freeplane is mind mapping, Knowledge Management, and Project Management software completely free and open source. You can it here: https://sourceforge.net/projects/freeplane/files/latest/download

And from developers git page and I quote:

Freeplane is a free and open-source software application that supports thinking, sharing information, and getting things done at work, in school, and at home. The core of the software is tools for mind mapping (also known as concept mapping or information mapping) and using mapped information. Freeplane is written in Java using OSGi and Java Swing. It runs on any operating system that has a current version of Java installed. It can be run locally or portably from removable storage like a USB drive. We use Github only as of the main code repository, all other project parts are hosted at the source forge. So all bugs and feature requests are managed in a separate issue tracker. There is a drop-down box for selecting different types of issues. Other sources of inspiration are our new forum and old forum. Some users write their ideas there. Every contributor and every team member freely decides what task he is going to work on, but for making the best decision we can communicate our self-set goals in the above forum. It is supposed to enable early discussions and community feedback and also to motivate you and other people.

How to start hacking and contributing

People new to the project can start with implementing a new small feature or doing some refactoring or documentation and not with the bug fixing. Not all bug reports seem to be equally important, and if there are important bugs they usually get fixed by people who broke the functionality. I think you should first get there :). For internal developer discussions, there is a private mailing list. It is held private to avoid spam mails. If you want to be subscribed let us know what mail address you are going to use with it. This list is the preferred way to ask all code-related questions because they usually get answered soon and by the most competent team member. Some documentation for new developers is available in Freeplane wiki https://www.freeplane.org/wiki/index.php/How_to_build_Freeplane and also here and here. It is written for new guys and should also be maintained by the new guys to stay up to date. Looking forward to any questions and contributions, Freeplane development team

Living in today's world sadly is still living in the COVID-19 pandemic. It has been more than a year and sadly pandemic is still very strong and we are battling it on a daily basis. Governments all over the world are trying to battle pandemics in their own way with their own ideas and prevention measures. We as individuals can not very much influence how will the pandemic itself go but fortunately in this modern age of information we can at least follow and be in the loop at the current state of the situation regarding it. Today instead of having a troubleshooting article or tips and trick for your PC we are doing something else but in the domain of internet technology, you know, just to keep everything still IT related ???? Below you will find websites with small descriptions of what they do to keep yourself informed and hope to get over this dreadful pandemic.

1. The WHO’s COVID-19 Dashboard

   If you are interested in real-time COVID-19 information about active cases, death tool so far, new cases and the number of vaccines administrated so far I would recommend WHO's dashboard. How WHO is a non-government institution composed of doctors from all over the world with just a single goal in mind, to help and put an end to this pandemic is a great non-biased source of information on the current state of virus spread.

2. Vaccine Finder

   Please be aware that Vaccinefinder is working only on the territory of the United States of America. The reason why it was included in this list is that basically it is a great idea and I hope to see this site expand on other world regions or at least that inspires the emergence of another worldwide website with this type of content. If you live in the USA, this site will be a great help since you can track where and how many shots are distributed to states and even towns in America.

3. COVID tracking project

   This site is also for U.S. residents, this time it is about tracking cases in each state with details and statistics. If you are interested in more detailed statistics of hospitalized patients per state or overall you are just interested in statistics about the pandemic in the U.S. this site might provide all the information about your needs.

4. NPR

   On national public radio or NPR for short, there is a special section devoted to the coronavirus where new articles about pandemic are released daily with new information and new findings on how to battle it and the current state of things. A great informational site to keep up with the current state of things.

5. Google's COVID-19 page

   Google has not been inactive during this pandemic and on its page specially dedicated to the COVID-19 virus you can find a lot of free information updated daily. From safety and prevention tips to data about pandemics there is a lot of ground covered on-page and we recommend at least going through the prevention section to inform yourself how to keep yourself and others safe.

6. Coronavirus tracker

   This daily updated chart can show how many cases and deaths are from chosen time period all in form of a chart, you can see charts for each country in the world how COVID cases rose or dropped along with the death tool it brought.

There you go, 6 websites to track and inform yourself about this dreaded pandemic which has managed to change the world and people's lives forever, sadly on the bad side.

The SearchUI.exe file is the one that manages the search feature of Cortana. However, a number of users have recently reported that this feature stops responding within minutes of booting their Windows 10 computer. This kind of problem could be caused by missing system files or some issues with the Cortana program itself. And so if the SearchUI.exe file is not responding, then you wouldn’t be able to use the search feature of Cortana. But worry not for this post will walk you through fixing this problem. Before you troubleshoot the problem, you can try to restart your computer and see if it helps, if it doesn’t, then proceed to the given options below.

Option 1 – Try to run the Search and Indexing troubleshooter

You might also want to run the Search and Indexing troubleshooter in Windows 10 as it checks whether the settings for Cortana are in place and automatically corrects any issues if the update or software installation has changed the settings. To run it just click on the Start button and select Settings > Updates and Security > Troubleshoot. From there, select the Search and Indexing Troubleshooter.

Option 2 – Restart Cortana’s process in the Task Manager

Restarting Cortana’s process in the Task Manager could also help you resolve the problem. Refer to the steps given below to do so.

• Tap the Ctrl + Alt + Del keys to open the Security options window.
• From there, look for the Task Manager in the given list and open it.
• Next, look for the process of Cortana and right-click on it, and then select the End Task option to end its process.
• After that, the Cortana process will restart by itself and re-initialize.

Option 3 – Try resetting Cortana

• Open Cortana and go to the Settings section where you’ll see the “Turning off Cortana clears what Cortana knows on this device, but won’t delete anything from the Notebook. After Cortana is off, you can decide what you’d like to do with anything still stored in the cloud” option. Turn this option off.
• Restart your PC.
• After your computer boots, launch Cortana again and check.

Option 4 – Try running the DISM tool

You can try running the Deployment Imaging and Servicing Management or DISM tool to fix the Windows Upgrade problem. 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
  • 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.

Option 5 – Try to reinstall Cortana

If none of the options given above works, you must consider reinstalling Cortana.

• First, right-click on the Start button and click on the Windows Powershell (Admin) option from the list.
• Next, type the following command and hit Enter to execute it:

Get-AppXPackage -Name Microsoft.Windows.Cortana | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)AppXManifest.xml"}

• Restart your computer and check if Cortana is now able to connect.

Option 6 – Try troubleshooting the problem in a Clean Boot State

There are instances that some conflicting programs installed in your computer might be the one that’s causing some issues with Cortana or causing the SearchUI.exe process to stop. To identify which program is causing the problem, you need to put your computer in a Clean Boot State. To do so, follow 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.)
• From there, start to isolate the problem by checking which one of the programs you installed recently is the root cause of the problem.

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.