Restore Access to Microsoft Update v6


Microsoft Update v6 (Windows XP & Windows Server 2003)

Along with the supposed "shutdown" of Windows Update v6 in 2020 when Microsoft made the switch over to SHA-2 signing support instead of dual SHA-1 and SHA-2, the Microsoft Update website went down along with Windows Update v6.

You can restore access to the Microsoft Update v6 website by getting it to work on your system by following the instructions below.


Warning: We are not responsible for anything that goes wrong to your system if an event like that were to occur. Please proceed at your own risk.

The following instructions apply to only Windows XP SP3 x86 & Windows XP SP2 x64, and Windows Server 2003 SP1/SP2 x86 & x64.

A video version of this tutorial is available on YouTube.

1. Firstly, you need to be able to access and check for updates on Windows Update v6 on your system. To do that, you can follow the instructions above (video tutorial: available on YouTube).

2. Next you need to download the following files:

3. Open the 2 cab files and extract the .DLL files to the desktop.

4. Open the mucltui_(your language) cab file and extract the .mui file to the desktop.

5. Remove the _(your language) extension from the mui file so it's just mucltui.dll

6. Move all the extracted files (2 DLL files and 1 mui file) to System32 to "C:\WINDOWS\system32"

7. Open command prompt and type the following commands "regsvr32 mucltui.dll" and "regsvr32 muweb.dll"

8. Once you've registered the 2 DLL files, you need to open your Proxy that you setup and head over to

9. You should now be at the page that says "Try Microsoft Update today", click on the "Start Now" button!

10. Click on the "Continue" button.

11. Finally, click on the "Check for Updates" button.

12. Microsoft update has a tendency to freeze upon checking for updates for the very first time, so if that happens to you, just close out of Internet Explorer and reopen it and go back to and check for updates and it should work!