Problems installing Windows Update KB268511

Hi Genesareth,

Thank you for posting the question on Microsoft Community.

I understand that you are unable to update KB2685811 on windows 7 computer. We are here to help you and guide you in the right direction.

Is this issue specific to KB2685811 update? Are you able to install other updates successfully?

You can try these methods:

Method 1

Run the windows update troubleshooter

http://windows.microsoft.com/en-US/windows7/Open-the-Windows-Update-troubleshooter

Method 2: Reset windows update components.

How do I reset Windows Update components?

http://support.microsoft.com/kb/971058

Important 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:

Back up the registry

http://windows.microsoft.com/en-us/windows7/Back-up-the-registry

Method 3

I would suggest you to place the computer in clean boot state, and then try to install the update and check if it helps.

A clean boot helps to verify if any third party application services or startup item is causing this issue.

How to troubleshoot problem by performing clean boot in Windows 7:

http://support.microsoft.com/kb/929135

Note: Once you are done with the troubleshooting, perform the steps inStep 3: to reset computer as usual.

Method 4:

Try the steps from the article:

Important 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:

Back up the registry

http://windows.microsoft.com/en-us/windows7/Back-up-the-registry

Unable to install updates in Windows Vista, Windows 7, Windows Server 2008 and Windows Server 2008 R2

http://support.microsoft.com/kb/2509997

Important: While performing chkdsk on the hard drive if any bad sectors are found, chkdsk tries to repair that sector. Any data available on that might be lost.

Important : Antivirus software can help protect your computer against viruses and other security threats. In most cases, you shouldn't disable your antivirus software. If you have to temporarily disable it to install other software, you should re-enable it as soon as you're done. If you're connected to the Internet or a network while your antivirus software is disabled, your computer is vulnerable to attacks.

Hope this information helps.

Keep us posted if you face any issues on windows in future. We will be glad to help you.