I have the same problem. I can't login, the little men just keep spinning.
I e-mailed support about this and they were helpful but as yet we haven't figured out what's wrong. They've asked me to re-install and do a system restore, both of which aren't working.
When I use the registry fix and open WLM I put in my password and user name and it produces the following error:
Signing into Windows Live Messenger failed because the service is temporarily unavailable. Please try again later.
Error code: 81000395
This is the first error code i've been able to produce.. but then as soon as I try and sign in again, the same problem occurs - men just keep spinning but nothing happens!
I've checked the service status and everything is running fine.
Oh also if I re-apply the registry fix, the same thing happens. First time I login it gives that error, then it just won't login.
Other people can login fine using my WLM. I can also sign in on any other computer but my own!
Using Windows XP SP2.
Scratch that. I re-registered some DLL's after finding a post through google, and all seems to be going fine!
vid