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

“We’ve set your PC back to the way it was right before you started installing Windows 10. 0x8007002C-0x400D The installation failed in the SECOND_BOOT phase with an error during MIGRATE-DATA operation”This kind of Windows upgrade error indicates that some of the files needed for the installation are locked out for some reason and that Windows was not able to migrate them to a new version. It could be that your computer does not have sufficient space for those files. Thus, no matter how many times you try to upgrade your computer, you always end up going back to the previous version of Windows. To fix the “0x8007002C – 0x400D, The installation failed in the SECOND_BOOT phase with an error during MIGRATE-DATA operation” error, here are some suggestions that might help:
net stop wuauserv net stop bits rename c:windowsSoftwareDistribution SoftwareDistribution.bak
net start wuauserv net start bitsSince the folder has already been flushed, it will be populated afresh the instant your restart your computer and open Windows Update.
The drivers for this device are not installed. There are no compatible drivers for this device.The problem here tends to no longer allow specific Bluetooth components to properly communicate with your Windows 10 operating system. It also affects laptops that do not have native Bluetooth support; therefore, the manufacturer installed a dongle on the inside to deliver the service. This is not the best way to do things because native support is always better. On the other hand, maybe you’re using a Broadcom USB Bluetooth dongle that is acting up, and as such, the error is showing. Below are solutions provided for this particular error and how to eliminate it.
Error Causes0xC1900101 – 0x20017, The installation failed in the SAFE_OS phase error during Replicate_OC operationTo fix this issue, you need to follow the given options below. But before you do, you need to create a System Restore point first so that if anything goes wrong, you can always undo the changes you’ve made.
dism /Mount-Image /ImageFile:H:sourcesboot.wim /index:1 /MountDir:C:UsersUserDesktopmount
C:UsersUserDesktopmountWindowsSystem32mcupdate_GenuineIntel.dll
dism /Unmount-Image /MountDir:C:UsersUserDesktopmount /commit
Once you are in the system, on the left tabs find and click on Clipboard.
If you are not logged in to your Microsoft account do so on the right panel by locating Sync across devices and click on sign in.
When you are signed in click on the option to turn it on.
One option is turned ON, you will be greeted with two choices, to copy everything from the clipboard automatically or to choose text which you want to sync and paste it with ⊞ WINDOWS + V. Choose whatever better suits your needs, and you are done.
Repeat these steps for other devices and you are done. 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.
Error CausesWindows/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.
Error 0xc0000142 can occur at any time, but there are many ways to resolve it. For instance:
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.
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.
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:
The third step is not recommended in case the error is caused by cmd.exe
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:
Error code 0x800ccc0f is an error that occurs when users attempt to send/receive emails in Outlook or Outlook Express. Though information regarding the error is limited and sometimes difficult to decipher to those unfamiliar with error code issues, the following are possible symptoms users can expect when this error occurs:
Error CausesErrors in Outlook or Outlook Express may occur due to a multiplicity of reasons. It may be due to a problem with your network connection or the server. You may also encounter this problem after an extended period of inactivity.
Since the error could be due to one of many issues, several solutions are recommended. However, note that these suggestions require you to make changes that come with various risks. Be sure to implement these instructions correctly to avoid causing more problems to occur.
If you are not confident that you will be able to successfully implement the solutions below, get help from a certified Windows technician or IT professional.
As with other error codes, manual procedures are available which users can take to correct the problem. To implement manual repair, follow the methods suggested below:
Since error code 0x800ccc0f may manifest itself due to an issue with your network, you can seek to rectify the problem by first checking your connection. To do this, open an Internet browser. Type a valid web address in the address bar and click Enter.
If you are unable to access the website, you may then seek to fix the Internet connectivity issue by using Microsoft Automated Troubleshooting Services. These free tools are available for download on Microsoft’s website.
Not only can these tools fix your Windows Firewall – if this is the cause of your connectivity issues. These automated troubleshooting tools can also resolve other issues related to your Internet browser or network.
However, if after downloading and running these tools error code 0x800ccc0f still persists in Outlook or Outlook Express, implement the solution below.
Verifying your network connection is another way you can resolve your Outlook issues, i.e. once the issue is in fact a network-based problem.
To verify your network connection, make sure your computer’s network devices are turned on and fully functioning. Also ensure that the cables that connect your computer to a network are secure. You may also contact your Internet Service Provider (ISP) to verify your connection.
If there is no issue with your network and error code 0x800ccc0f persists, you will need to implement method three.
Problems with sending or receiving email messages based on the 0x800ccc0f error code could also be due to configuration issues for individuals who connect using a router. If this is a misconfiguration issue, you may be able to resolve the problem by bypassing the router and connecting through your modem.
Before doing this, however, be sure to check if your firewall is turned on as connecting directly can leave your machine vulnerable. Prevent attacks by checking your Windows Firewall setting. After making adjustments where necessary to ensure the firewall is turned on, test your connectivity to ensure you can access a connection. Also, check Outlook to see whether the error message has been resolved. If the error persists, consider the next solution.
Third-party apps like anti-virus software can sometimes cause interference, leading to errors. For this reason, check if the antivirus on your device is the source of the issue. Start by disabling the antivirus software. You may also turn off the software’s email scanning feature to verify whether or not that is the cause of the error.
Note that disabling your antivirus is only a temporary solution as it is not recommended that you use your computer without such protection in place. Consider replacing your antivirus or uninstalling and reinstalling for a permanent fix if indeed your issue with error code 0x800ccc0f was caused by interference from third-party apps.
Also, consider downloading a powerful automated tool to protect your machine from possible errors in the future.
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