We are having the same issue with a computer right now. I was wondering if you got any fixes to your problem since you originally posted in the forum, or if you found a way to correct the problem.
I'm terribly sorry if this is a repost but I could not find anything useful.
In short, I go to log into my account and it brings me to just my wallpaper and then it logs me right out back into the logon screen. I already tried a repair instal.
Any help is extremely appreciated!