You cannot log on to Windows XP after you remove Wsaupdater.exe:
http://support.microsoft.com/kb/892893

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Mark L. Ferguson MS-MVP
https://mvp.support.microsoft.com/profile/Mark.Ferguson

"Mr Chaos" <Mr Chaos@discussions.microsoft.com> wrote in message
news:FBEDDE38-655A-4C84-80A3-7188761A4F44@microsoft.com...
> WinXPSP2 starts fine, but when I try to log into any account, it start
> logging on and then immediately logs me off.
>
> I have tried Safe Mode and the same thing happens.
>
> I haven't made any significant configuration changes and in fact had the
> computer turned off all weekend and when booted up, this started
> happening.
>
> Anyone with some ideas of what is going on? I use Kapersky 6.0 and Window
> Auto Update.