Dell Latitude Cp, Cpi, Cpx, C600, C800, Inspiron 3800 8000 4000 601212 CD-ROM Drive "lock cursor" Questions

Dell cpx At random lengths of use (but usually less then an hour) the cursor locks up and there is no keyboard response either. Hardboot is the only current remedy. Any suggestions? BIOS? Memory? ...

...command window type in: chkdsk /R and hit enter. It will warn you that you cannot do this on a locked drive. It will ask you if you want to dismount the drive by choosing Y for yes or N for no. ...