Why can i install Security Update for Microsoft .NET Framework 4?

[killer bee]

I try to install "Security Update for Microsoft .NET Framework 4 on Windows XP, Windows Server 2003, Windows Vista, Windows 7, Windows Server 2008 x86 (KB2446708)" using windows Automatic update service, in many times, but i can't. Always show "66A error". Windows update center only show error for this "Microsoft .NET Framework 4 " update. (Other updates successfully install.) Then i manually downloaded its .exe installer and try to install it. Then i receive this error. How do i install this security update?


Windows Update center error.


Manual installation error.

 

[Carolyn]

Try this:

Error code 66a .net framework 4 - Microsoft 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 (with my PC) your experience may vary.
F. When completed, go to your update center, and update it again.

 

[NoN]

More recent update:

NDP40-KB2478063:
Download details: Microsoft .NET Framework 4 Platform Update 1 - Runtime Update (KB2478063)

 

[killer bee]

Not work above solutions. So what next?

 

[Glhs958]

You can try to use the removal tool for .net and then reinstall. works for me every time at the shop.
.NET Framework Cleanup Tool User's Guide - Aaron Stebner's WebLog - Site Home - MSDN Blogs

 

[killer bee]

After completely removing .NET Framework 4 my problem fix. Thanks all of you!