I had a problem with my work computer not being able to log into Windows Live Messenger.
I was able to login in the past on the computer but all of a sudden no longer. I tried uninstalling the program and installing the latest version but that didn't help. I research the internet for solutions but none worked until this simple fix...
Re-register the wups2.dll by going to the run line and typing the following and then clicking OK:
Appearently the issue is releated to XP sp3.