Neat utility came to my eyes:
CDCheck is utility for prevention, detection and recovery of damaged files with emphasis on error detection. It supports CRC files and binary compare. CDCheck can be used on all files visible by the operating system. This means all files that you can see in Windows Explorer (CDs, disk drives, floppy disks, ZIP drives...).
So if you want to reinstall your system, and made a backup of all the data at the present. Check it first with this util! Perhaps it is wrong-written... And then you're busted. So no 'busts' anymore when using this.