This is a very bad error.
It is hardware related and the best you can hope for usually in bad RAM, mainly it's best because it's relatively easy to fix. If you have multiple sticks of ram, remove one, try and repeat the error, If it repeats, replace the removed stick and remove another...amd so on
It could occur if you are overclocking your system.
Most frequently, it is a failing motherboard or device...in this case, the cd-rom. I would be surprised if it were the cd-rom since this is usually associated with RAM, and there is relatively little of it on the cd-rom (typically a 2mb buffer)