My MSN Messenger starts up fine, gets to the log-in screen, but when I try to sign-in, it tells me that there is a problem with Windows Live Communications Platform and needs to close; asking me whether or not I want to send an error report. The Client doesn't close, but it just stops signing in.
If I'm correct, the windows live communications platform is the conference calling feature, and I've tried multiple things to try and fix it. I've tried fixing, I've tried re-installing, I've tried deleting several files and forcing a repair, as well as deleting only a select few .DLL files (suggested by some sites) and nothing seems to work! Another site said my hosts file could be corrupted and my computer infected with malware/spyware etc... but I've looked through the file and have not found what they're suggesting, ran scans and everything, but again, to no avail

Any help would be appreciated in getting this solved as I haven't spoken to some of my friends in 2 or 3 weeks :/
Even if the best solution is to just totally uninstall and get the previous version of messenger I'm happy with that, but I don't usually like downgrading.
Edit:
Windows Live Messenger
Version 2009 (Build 14.0.8064.206)