Disk consistency error help

for some reason I had a disk consistency error on my anime storage drive I near lost 250gb of anime. is there anyway i can fix the avi files. There still there i just cant play them in windows media player because there courrpt for some odd reason when I rebooted my computer i got a disk consistency error and let it ran threw on accident and it courrtped my avi files. I am running windows xp pro with sp2 and all the updates.