Corrupted or DRM

I have some .wmv files that i want to play but WMP tells me the files are either DRM protected or corrupted. I’ve tried other media players and I’ve tried converting them to something else with no luck. If I open properties>summary for one of the files i get this error message ‘a disk error occured during a write operation’.
Can anything be done so i can watch them or am i wasting my time
thanks