microsoft.public.windowsxp.security_admin

i have a problem with my laptop: it couldn't load the operating system
because of viruses, i then went to safe mode and installed a trojan
remover and i was able to remove atleast most of the viruses. after
that, i restarted the machine and i was able to install a sysmantec
anti-virus and restarted the machine again. now i can't login , can't
login on the safe mode as a normal user and as an administrator. i
tried loading the last known working configuration stil the not
workin.

what it does now: when you click to login it pretends to load the
settings and immediately start loggin off !

please help! i have important information in it!