[Errno 5] Input/output error on Install Back Track 5 R3

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http://www.backtrack-linux.org – i want to install BACK TRACK 5 R3 in GNOME 32bit. i receive error in %41 in install proccess. "The installer encountered an error copying files to the hard disk: [Errno 5] Input/output error This is often due to a faulty CD/DVD disk or drive, or a faulty hard disk. It may help to clean the CD/DVD, to burn the CD/DVD at a lower speed, to clean the CD/DVD drive lens (cleaning kits are often available from electronics suppliers), to check whether the hard disk is old and in need of replacement, or to move the system to a cooler environment." This is the problem. Please I (HowTos)