Windows Update Problems

Many users of Windows XP, Windows 2000 and Windows Server 2003 have had problems when trying to access the Windows Update site.

I’ve searched all over the Internet for solutions to these problems and came up with the following list of possible solutions. These solutions are not arranged by any specific order, although I do recommend trying each one from top to bottom till you reach the one that helped the most.
Here is my current list of Windows Update error codes and their respective solutions:

If you happen to know about other methods of solving WU problems please let me know smtp.