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Fix Windows Update Error C8000266?

Windows Update is used to maintain Microsoft Windows and different Microsoft packages up to date. Being probably the most important providers for the working system, it downloads and installs the safety updates usually to Windows. However, they will trigger errors at occasions that turns into a extremely disturbing second at that state of affairs. One such error is Windows Update Error C8000266.

C8000266: Windows Update encountered an unknown error

In this information, we now have defined some fast fixes that may presumably provide help to to eliminate this drawback. So, let’s get began.

Windows Update Error C8000266

To repair Windows Update Error C8000266, comply with the beneath suggestion:

  1. Run Windows Update Troubleshooter
  2. Reset the Windows Updates Components

Let us see them in particulars:

1] Run Windows Update Troubleshooter

Windows 10 Update Error C8000266

The Windows Update troubleshooter is a good built-in software that may actually repair a lot of the frequent replace associated points on the pc. The process to run this software is as follows:

To get it began, open the Windows Settings (Win+I) first.

Then choose Update & Security > Troubleshoot > Additional troubleshooters.

On the following web page, choose Windows Update after which click on Run the troubleshooter button.

Wait for some time till it detects and solves the issue all through.

Once it completes the method, shut the troubleshooter, and restart your system.

Furthermore, you may also attempt working the Windows Update Online Troubleshooter.

Now go to the Windows Update and attempt to set up the pending replace.

If you’re nonetheless going through the issue transfer right down to the following potential resolution.

2] Reset the Windows Updates Components

If working Windows Update Troubleshooter doesn’t repair the issue, you may reset the Windows Updates Components manually. Here is a fast information you need to use to take action:

Open Run dialog field utilizing Win+R keyboard shortcut.

Type in cmd and press Ctrl+Shift+Enter to open an elevated command immediate.

If UAC prompts on the display screen, click on Yes to grant them permission.

On the elevated command immediate window, sort within the following instructions and hit enter on every line.

internet cease bits
internet cease wuauserv
internet cease appidsvc
internet cease cryptsvc

This will cease working the Background Intelligent Transfer Service or BITS, Windows Update service, and Cryptographic service.

Now you might want to reset Windows Update parts by eradicating all of the qmgr*.dat information out of your system.

To achieve this, sort the beneath command-line within the command immediate and hit enter to execute it.

Del "%ALLUSERSPROFILE%Application DataMicrosoftNetworkDownloaderqmgr*.dat"

To affirm the deletion, sort Y out of your keyboard.

Next, rename the SoftwareDistribution and catroot2 folders.

To try this, sort the next instructions within the command immediate window. Also, be certain to hit enter after you sort every command.

Ren %systemroot%SoftwareDistribution SoftwareDistribution.bak
Ren %systemrootpercentsystem32catroot2 catroot2.bak

Next, you need to reset the BITS service and the Windows Update service to its default safety descriptor

To do that, sort the beneath instructions within the elevated command immediate window:


Press enter to execute the command and hit enter after each.

Type the beneath textual content code within the command immediate window to maneuver to the System32 listing. Then press Enter.

cd /d %windirpercentsystem32

Now enter the next instructions and ensure to hit enter after every command you sort there.

regsvr32.exe atl.dll
regsvr32.exe urlmon.dll
regsvr32.exe mshtml.dll
regsvr32.exe shdocvw.dll
regsvr32.exe browseui.dll
regsvr32.exe jscript.dll
regsvr32.exe vbscript.dll
regsvr32.exe scrrun.dll
regsvr32.exe msxml.dll
regsvr32.exe msxml3.dll
regsvr32.exe msxml6.dll
regsvr32.exe actxprxy.dll
regsvr32.exe softpub.dll
regsvr32.exe wintrust.dll
regsvr32.exe dssenh.dll
regsvr32.exe rsaenh.dll
regsvr32.exe gpkcsp.dll
regsvr32.exe sccbase.dll
regsvr32.exe slbcsp.dll
regsvr32.exe cryptdlg.dll
regsvr32.exe oleaut32.dll
regsvr32.exe ole32.dll
regsvr32.exe shell32.dll
regsvr32.exe initpki.dll
regsvr32.exe wuapi.dll
regsvr32.exe wuaueng.dll
regsvr32.exe wuaueng1.dll
regsvr32.exe wucltui.dll
regsvr32.exe wups.dll
regsvr32.exe wups2.dll
regsvr32.exe wuweb.dll
regsvr32.exe qmgr.dll
regsvr32.exe qmgrprxy.dll
regsvr32.exe wucltux.dll
regsvr32.exe muweb.dll
regsvr32.exe wuwebv.dll

This will re-register all of the respective BITS information and Windows Update associated DLL information

Now you might want to reset the community configurations that could be the function of the problematic error.

To achieve this, sort within the beneath command-line and hit enter after each.

netsh winsock reset
netsh winsock reset proxy

Once it’s all accomplished, you might want to restart the providers you stopped it earlier like Background Intelligent Transfer Service or BITS, Windows Update, and Cryptographic providers.

To achieve this, once more go to the command immediate and sort within the beneath command line. Also, don’t neglect to press enter after every command.

internet begin bits
internet begin wuauserv
internet begin appidsvc
internet begin cryptsvc

Finally, sort Exit within the Command Prompt to shut the window.

Once you full the whole course of, restart your Windows PC to use the adjustments.

After it begins up, go to the Windows Updates and attempt to set up the pending updates out there on the pc.

We hope the above-mentioned technique would provide help to to resolve this challenge. 

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