Help Pls!! Cd Breakdown??

Listen guys I have another problem. I keep getting error messages during intallation of anythinG: for example while installing a game (original CD in very good shape) there is an error saying: "Unable to install file whatever.cab)), installation has to be terminated". What's more I have the same problem while installing Windows!!! Probably a hardware breakdown?? I've tried 4 different CD(or DVD) drives, but to no avail ?? What else could have broken down ??
HELP PLS
Computer: Pentium 4 2.0GHZ
768 DDR
ATi Radeon 9700 PRO 128 MB DDR
Seagate Barracuda IV 60GB
DVD-LG
CD-RW-LG

 

Sorry for repeating the same thread... I thought I didn't send the last one

 

A bad memmory chip can cause this for XP or if you have bad sectors on the hard drive.

 

but i've been using the computer for quite some time now(2years) and the problem appeared recently after a serious system crash, after which Windows XP had to be re-installed.
I forgot to mention that i sometimes have the blue-screen errors during installation