XP does not logon after Symantec Internet Security 2005

After installing NIS 2005 and deleting several viruses, XP boots to the logon screen and does not allow access to the desktop.

Same in safe mode – Admin, Acct1, Acct2 ,… no passwords ever used.

System says “windows is logging on” 15 seconds later “windows is logging off”

Symantec will not offer any solution – they say call Dell. Dell says you bought the software from Symantec.

I just purchased this aggravation and I can’t get assistance from Symantec. Im switching to McAfee – I can afford hours on hold – phone trees nested 7 deep and 10 wide only to be told by Symantec, “its not our problem …”

Does anyone have a suggestion how to fix this other than reload a new OS?

Mark