Hi Godof,
Thank you for posting the question in Microsoft Community forums.
From the issue description, you are facing issues with installing Windows Update and downloading updates stuck at 0% complete.
In order to provide you with a quick resolution, please reply to these questions:
1.
Does the issue occur with particular update?
2.
Have you made any changes on the computer prior to the issue?
Follow the suggestions listed below for a possible fix:
Method 1: You can run the windows update troubleshooter and check if it helps:
Open the Windows Update troubleshooter
http://windows.microsoft.com/en-US/windows7/Open-the-Windows-Update-troubleshooter
Method 2: You may follow steps from the article mentioned below and check.
Unable to install updates in Windows Vista, Windows 7, Windows Server 2008 and Windows Server 2008 R2
http://support.microsoft.com/kb/2509997
Note: This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if
you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back
up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base. How to back up and restore the registry in Windows:
http://windows.microsoft.com/en-US/windows7/Back-up-the-registry
Warning: Microsoft does not recommend interrupting the CHKDSK process. Microsoft does not guarantee the integrity of the disk if the
CHKDSK program is interrupted. For safety you can back up your data before using the check disk command.
Method 3:
I would suggest you to follow steps from the article mentioned below and check:
Error: Failure configuring Windows updates. Reverting changes. Do not turn off your computer when you try to install Windows Updates
http://support.microsoft.com/kb/949358/en-us
Hope this information helps. If you need any assistance on Windows please revert back will be happy to help you.