text: compaq presario stalls-must be restarted often. not virus, cdr hangs. replacement compatibility a problem? hp no help only want to sell their products.  want to know if i can buy cheap wal mart and it work.  don't know anything about compatibility of replacements and difficulty of self installation.  i know cd is the problem.  will not work for writing nor reading cd. dude  it so easy that a blind person can change the cdrom  drv go to your library and get the book called pc repair for dummies it will have all your answers if not email me at rocky_garfield@yahoo.com