Just got this from Bink's Windows XP:

Hello Microsoft, in your daily visit to my site, do you mind telling me what is wrong with WindowsUpdate?
From different machines XP/2k the scan stops at 0%, so infact it doesn't start at all.

It's not just me I've received more emails from people with this issue. Also if you install Win2K SP3 the Windows Update program breaks with the error code "0x800A138F", then you will need to execute the procedure at Binks' to fix the problem. WindowsUpdate Does Not Work - FIX