It is either the CD/DVD disc itself is bad or the DVD drive has failed. Does it do that will all discs/ If it does you might want to go into the hardare profile under system and delete the secondary IDE channel and then reinstall. If you do that make sure you have your mobo driver cd ready. A cyclic redundnacy error is simply that the drive cannot read the data on the disc and can be ether the disc itself or the drive is fubared!!
Noli Nothis Permittere Te Terere!!
EVGA 680i, Dual EVGA 8800GT'S (650/950), 4 gigs OCZ DDR2 1066, Intel Q9450 at 3.8 Ghz, Koolance Water Cooled, Dual Plextor16x DL DVD+/-RW. Dual WD 250gb 16mb Cache Sata 3.0. 3DMark06 score = 19,168.