I have a Compaq nc6220, running on WIndows Vista, Ultimate, the DVD RW driver is not working,On Windows XP Pro, it is working after installing VISTA, it stops working. Can anybody help?

Support Information:
Device Type: CD / DVD
Manufacturer: Matshita
Model: UJDA650 DVD RW
Interface: Other
Operating System: Windows Vista
Age of Device: < 2 years old
FCCID:

Type of drive: dvd (dvd reader and cd-rom combo)
Location: internal
What recording software are you using?: Nero/version

Find it on DriverGuide (http://members.driverguide.com/index.php?action=srch&sm=b&aax=&qa6=0&qa5=3&qa7=1801&dp=2&qm0=UJDA650+DVD+RW&jmd=and&fzz=d) | Find it with Google (http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=Matshita+CD+%2F+DVD+Matshita+UJDA650+DVD+RW+Wind ows+Vista+)

Is the drive listed in My Computer and Device Manager?

Note: Optical drives never require a driver. The OS provides native support for optical drives with built-in drivers.

Yes, the device is listed in the Device Manager but there is a yellow tag on it that is why I suspect the reason why the system does not recognized the drive at all within the WIndows Explorer.

Try deleting the drive in Device Manager, then reboot. Windows will automatically re-detect and install the drive again. Now see if it's still flagged as having a problem.