I have an older Compaq D510s computer, 2.5 GHz Pentium 4, 2.5 GB ram. I have loaded Win XP, then Win 7. I have tried two different DVD drives, but the computer won't read the DVDs. The drive is recognized and there is no update for the drivers. The drive will read a CD, but not a DVD. A second D510s running Win 7 does read DVDs. Any ideas? PCBUILD maintains hundreds of useful files for download visit our download web page at: http://freepctech.com/downloads.shtml