Gateway Desktop WindowsXP Virus Infection, Comp no longer working

Ok, so i was downloading a music organizer and one way or the other i think i got some viruses. I kept getting popups out of nowhere saying i had 24 viruses, 17 of which were dangerous and to pay for virus software. Anyways, i kept trying to do a system restore, but it didnt let me go to a date prior than that day. Which i thought was weird. I was running norton 2009 and it said it found some viruses on my comp. and they were "removed." But i still kept getting the popups saying i had viruses. I didnt want to do a full system restore because i didnt want to lose any of my data. i had tons of my daughters pics and videos of when she was a baby, and i hated the thought of losing them. i still feel very bummed about it. Anyways, i decided to do a repair windows with the original operating disk. I inserted it, and it asked me what i wanted to do, i clicked on repair windows, and it started going through the beginning of the installation but i got scared because when it was going through the installation process i for some reason thought i was going to lose my data. So i cancelled. Then i tried to go through the disk again and this time it no longer asked me if i wanted a repair windows or full system restore. it just started doing the installation, so i let it go through, but i kept getting popups saying a file was corrupt and that i could retry or skip. i kept pushing skip because retry would do the trick. so when it finally got through the installation it just said a file was corrupt and the installation couldnt complete. i tried turning on my comp and now it wont load all the way through a black screen comes up with the white letters saying file corrupt. try installing file again. i dont know what to do! how can i get my precious files back. i feel so helpless. can someone please help. i really dont have money to get it seen my a pro. i will really appreciate any advice. thanks in advance. Sandra