FWIW, I agree with Nighthawk that it may be a combination of windows issues and HD errors causing the problems in the first place. This has been happening to me too for the last 3 months or so. (especially since dual booting win7 x64/xp pro x32)
I d/l an iso, run the hash checks and everything checks out A-OK.
Copying to another physical HD corrupts the image. Multiple copy attempts eventualy succeed.
Thoughts;
- Known good ISO's are found to be corrupt a few weeks later.
- Hashtab cobbles my windows7 install.
- Win7 seems more sensitive about HD's.