here probably is a program out there in the distance hiding under microsofts protection but for now your gonna have to dl'ed it again its not that hard
in winrar there is an option that says ignore crc errors and keep the file if errors occour. because normally after errors, it deletes the file so this option prevents that. also, i have had that happen to me several times... and here is what i did to counter measure that.
- target drive has low disk: give it ample space to extract stuff. delete your temp files. empty trash.
- defrag the target disk
If not does this? http://www.topix.com/forum/tech/TRM699DVNI0UI9LMH#lastPost