The information about the system isn't correct, I can't see how to edit it for this post only. My parents have an old system with XP running on it, not sure about the specifics of the hardware. It has run into a very strange error today, and I can't seem to find any way to deal with it. The system will log into the user account just fine. Other than the hidden Administrator account, there is just one: user. The system automatically logs out and spits back to the welcome screen, even in safe mode. Under the administrator account in safe mode, this is still a persistent problem. I haven't a clue how to fix it. Any help?

bennyboy371, a couple of thoughts spring to mind. First is power supply. Since it seems fine for a little while, sorta sounds like something heats up then...? Next is a file called 'index.dat' using up all available memory. A common ailment is a file called 'index.dat'. It gets read every time and can take quite a while if it’s too bloated. It's like a log file and keeps a record of every site you visit on the web. Empty, it's 32K, but it can grow HUGE. It's a protected file and can't be deleted by normal methods. CCleaner (free @: http://www.ccleaner.com/) can get rid of it when it’s ticked (not to worry, it gets rebuilt EMPTY on the next boot.). Could well be neither, but worth a try. HTH. Ed in Texas.

Actually it's not fine for a little while. It obviously loads everything, but I never see the desktop. I'm entirely unable to get into the computer in any way.

Logs off before fully logged on- http://www.computing.net/answers/wi... Response Number 2 looks like a fix.