automatically logging off

[guy]

just after logging on , windows is automatically logging
off without me being able to do anything and stay loged
on.
I have no idea what to do , can anyone halp me

 

[Guest]

If windows xp cannot 'boot' or 'log on' to windows xp OS or 'operating
system, Then you will need to perform a reinstallation or repair of windows
xp.
Perform a Repair Installation:
http://microsoft.com/windowsxp/using/helpandsupport/learnmore/tips/doug92.mspx

 

[Rock]

just after logging on , windows is automatically logging
off without me being able to do anything and stay loged
on.
I have no idea what to do , can anyone halp me

Have you recently removed spyware? This can happen as a result of that.
See if this link helps:

Unable to Log On To Windows XP After Removing wsaupdater.exe
http://www.lavasofthelp.com/articles/v6/04/06/0901.html

or

A User Logon Request Is Rejected Without Any Messages
http://support.microsoft.com/?id=313322