66a error sostware update?

i have tryed for about a week to install this... Security Update for .NET Framework 4 on Windows XP, Windows Server 2003, Windows Vista, Windows 7, Windows Server 2008, Windows Server 2008 R2 for x64-based Systems (KB2160841)

Download size: 2.5 MB

You may need to restart your computer for this update to take effect.

Update type: Important

A security issue has been identified that could allow an attacker to compromise your Windows-based system that is running the Microsoft .NET Framework and gain complete control over it. You can help protect your computer by installing this update from Microsoft. After you install this item, you may have to restart your computer.

More information:
http://go.microsoft.com/fwlink/?LinkID=194969

Help and Support:
http://support.microsoft.com


but i keep getting this 66A error? anyone got any ideas?
cheers in advance

 

Greetings, falcon1.

Have you tried this (from Microsoft Social Answers)?

A. Click on Start and click on Control panel.

B. Go to Program and Features.

C. Scroll down to Microsoft.Net Framework 4 Client Profile, right click it.

D. It will give you a choice of Uninstall/Change, click it.

E. Then, it will give a choice to Repair it, pick Repair it. It will take about 4-10 minutes to repair - your experience may vary.

F. When completed, go to your update center, and update it again.