Then after you get that file you want to ask yourself why that file was bad. It could be a) just a random MS screwup, b) a virus caused it (which is unlikely), or c) your harddrive is about to go tits up, or just has bad sectors starting and is on the fast path to going tits up.
Get the file you need (ask here if you cannot find it elsewhere) and scan that drive and see what comes up.