-HELP WINDOWS XP LOG-ON PROBLEM

[TeejayV]

Windows XP keeps logging me off every time I log onto it.
I type in my password and press enter. It would flash my desktop for a second and then instantly log me back off automatically.

Can anyone help?

 

[WannaFly]

Do you have a different username you can try?

Does it happen in safe mode?

It might be some kind of spyware/virus..

 

[TeejayV]

it's the only username on the desktop.

it happens even in safe mode

i hope it's not some sort of spyware, virus, because i don't know how i would diagnose the problem