Did you try
Windows Cleanup Utility? If you want to try it I'd suggest taking out anything related to the whole Live Essentials package and re-installing it all from scratch. I'm not terribly hopeful that it will help. Usually Zap Messenger and/or RevoUninstaller do the trick.
I would also suggest removing anything you can find with regard to both Plus!
and A-Patch and
do not reinstall them until we see if we can get you working. I'd use RevoUninstaller on them if you can so that you can get registry entries out easily.
Reboot the machine after all the removals. You can download the old version of WLM (and it should still work) from
Filehippo. To the best of my knowledge, 14.0.8064 will still login without issue. I have heard of people still installing 8.5 successfully right now. So there is no need to try and trick the system just yet - do not change the version number.
After you install WLM try to sign in normally again and let me know what happens before you add any 3rd party programs back into the mix.
Can you please tell me if you are on XP, Vista or Windows 7? And if you are on XP or Vista which service pack you have installed? Also, can I assume you are the administrator on this machine?