I had this same problem a few years ago, I would reformar my harddrive, then try install a system, It couldn't load some files, so i just skipped them... then when the installation began, it got about to 32% done then froze, I kicked it a few times it got to like 56% then shut down... I tryed to reinstall it got to like 68%, then agian 85ish%, then 100% and it froze, i trted agian, and 100% and it froze, i had to compleately earse everything on my harddrive, all the partitions, then reinstall them again, then i got a bootleged OS and it ran fine...
Invalid CD KEY
or quite unlikely a messed up harddrive.
Casual (AMD 4000+ x4) (Stock mobo) (750 Gig + 8 TB Xternal) (150 RAPTOR) (9800GT OC x2)
(OCZ PowerStream 800 Watt) (2G OCZ) (XP/Vista)
Torrenter (1.05GHZ) (Stock mobo) (250GiG) (9200 Radion) (Stock PSU) (768MB) (XP)
Laptop (Intel Core 2 Duo @ 2.8Ghz) (2G) (8600GT) (XP/Vista) (500GiG)