Fix for Microsoft and/or Windows update.

If Windows or Microsoft update stops working, it may be that wuaueng.dll has been "deactivated".
You can "re activate" same by typing this command into the Run window on the Start menu:

%SYSTEMROOT%\SYSTEM32\REGSVR32.EXE %SYSTEMROOT%\SYSTEM32\WUAUENG.DLL

It works for me. I found this gem on the Microsoft Web site here:

http://answers.microsoft.com/en-us/windows/forum/windows_other-windows_update/windows-update-error-number0x80070424/95998d7e-9e38-4599-a6cd-fd201447fa92