HELP !!! Winlogo.exe Trojan !!

HELP !!! Winlogo.exe Trojan !!
hey all my computer has got the Winlogo.exe trojan,
now my Dell XP computer just keeps rebooting, and will only work in safe mode,and i cant transfer any files now !
i really need some help guys !!
i got some really important files that i need for uni !!!
any help plz !!!