Incompatible hard drive is also a factor which cause cd physical memory fix error. By the way, good using habit and regular maintenance will extend its life span.Third -- Unreasonable startup or shutdown operation.
Have you ever forced a shutdown operation to your computer with programs running? It's quite bad thing to do, violent and high-risk to computer, and yes, it will trigger cd physical memory fix error.Fourth - Baddly programmed third party applications.
Baddly programmed application is likely to be a cause of cd physical memory fix error, when users install or uninstall programes, especially uninstall some applications, some vital or important data/files may be deleted accidently. Next time, when you launch the personal computer or open a program, that file can't be found, then error will pop ups.