What is 643 error when trying to install updates?

When I try to install the updates, it says error 643.  unsuccessful.  also impossible to download my farm on farmville.  don't know if it is related.

When I try to install the updates, it says error 643.  unsuccessful.  also impossible to download my farm on farmville.  don't know if it is related.

Error 643 - there has been many comments in this regard.

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

Vista
http://Windows.Microsoft.com/en-us/Windows-Vista/Windows-Update-error-80070643

Windows 7
http://Windows.Microsoft.com/en-us/Windows7/Windows-Update-error-80070643

If the error is related to the .NET Framework 4, try to repair the same first.

Repair the installation of .net Framework 4- Windows Vista and Windows 7 users follow these steps to repair the installation of .NET Framework 4:
Close all running applications

  1. Click Start, type Uninstall in the Search box, and then click uninstall a program
  2. Double-click Microsoft .NET Framework 4 Client Profile to start the .NET Framework 4 Client Profile Maintenance application
  3. Select Repair .NET Framework 4 Client Profile to its original state , and then click Next
  4. Allow the repair, and then click Finish
  5. Click restart now to restart your computer
  6. Visit Windows Update and try to install the updates again.

in regards to your farm on farmville, I don't know if it is related.

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