Unable to recover system

My friend has a sansui personal computer that was giving him a problem. He could not recover his system. I tried to assist him by trying to boot from the recovery cd that came with the computer. Through copying files it stops and gives warnings that it cannot copy some files. I initially thought the problem lied with the cd he was using maybe it was damaged so I tried my Windows XP Recovery disc on his computer. Which was unsuccessful as the blue screen that damage to the system is being prevented is displayed. As a result I tried my recovery disc on my computer and seems to be working fine. So I was wondering what the possible cause of this is??

run scan disc on your C drive using a startup disc . it is quite likely your hard drive has many bad sectors or has failed completly

Th first boot cd youhave tried seems to have scratches etc.