MRyanT 0 Newbie Poster

i need help...period. I have a dell computer and when i boot up i am unable to open any of my folders and recieve an error message that needs to be sent to microsoft.....this continues until i log on to AOL and then i am able to open all my folders??....very strange....is this a virus, or something to do with XP?...i have tried XP service pak 2 to rid the problem....no luck, i have tried my mcaffee virus scanner but no luck.......any suggestion would be greatly appreciated.