Managed to fix it. Tried to stop the BackupAssist service. Windows couldn't stop it, was stuck on "stopping". Killed the process using the command found here.
http://emalf-pc.blogspot.com/2009/12/ki ... rvice.html BackupAssist was able to re-open and seems to work now. Will keep you posted. My guess is some windows ASP.Net update messed it up.