The following updates keep again & looks again, it fails to install

Update of security for Microsoft .NET Framework 4 on XP, Server 2003, Vista, Windows 7, Server 2008 x 86 (KB2737019)
Security Update for Microsoft .NET Framework 2.0 SP2 on Windows Server 2003 and Windows XP x 86 (KB2729450)
Update of security for Microsoft .NET Framework 4 on XP, Server 2003, Vista, Windows 7, Server 2008 x 86 (KB2729449)
Update of security for Microsoft .NET Framework 4 on XP, Server 2003, Vista, Windows 7, Server 2008 x 86 (KB2742595)
Security Update for Microsoft .NET Framework 2.0 SP2 on Windows Server 2003 and Windows XP x 86 (KB2742596)
Update of security for Microsoft .NET Framework 4 on XP, Server 2003, Vista, Windows 7, Server 2008 x 86 (KB2736428)
Security Update for Microsoft .NET Framework 3.0 SP2 on Windows Server 2003 and Windows XP x 86 (KB2756918)
Update of security for Microsoft .NET Framework 4 on XP, Server 2003, Vista, Windows 7, Server 2008 x 86 (KB2789642)
Security Update for Microsoft .NET Framework 2.0 SP2 on Windows Server 2003 and Windows XP x 86 (KB2789643)

http://taurarian.MVPs.org/framework/Net_Framework.htm

In many cases repair .NET Framework 4 is sufficient to correct the corruption but in some cases, uninstall and reinstall .NET Framework 4
(Ref: http://support.microsoft.com/kb/976982)

Windows XP users follow these steps to repair the installation of .NET Framework 4:

  1. Close all running applications.
  2. Click Start, click Control Panel , and then click on Add / Remove Programs.
  3. Click Microsoft .NET Framework 4 Client Profile in the list of installed programs, and then click Change/Remove.
  4. Select repair .NET Framework 4 Client Profile to its original state , and then click Next.
  5. Repairs completed, click Finish.
  6. Click restart now.
  7. After you log in to Windows, click the Start button, then type Windows Update in the box to search for and then click Windows Update.
  8. Click find updates. When the scan finished, click install updates to Windows.
  9. Follow the instructions on the screen to install the updates of Windows.

You can use this to check what versions are actually installed on your computer:

The user guide for the .NET framework installation check tool
http://blogs.msdn.com/b/astebner/archive/2008/10/13/8999004.aspx

.NET framework Cleanup Tool:
http://blogs.msdn.com/b/astebner/archive/2008/08/28/8904493.aspx

For the other .NET Framework updates.

Error code '0x8007066A' when you use the Windows Update Web site or Microsoft Update to install the .net Framework update:

http://support.Microsoft.com/kb/2507641/

When you try to install an update for .NET Framework 1.0, 1.1, 2.0, 3.0 or 3.5, you may receive Windows Update '0 x 643' error code or error code Windows install "1603".

http://support.Microsoft.com/kb/923100

When installing updates using Windows update or Microsoft Update you may receive error 80070643 0 x or 0 x 643
http://support.Microsoft.com/kb/976982

Tags: Windows

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