[thecavern]

I just bought a new Desktop a month ago. I put in a CD to backup some
files and nothing appeared to be happening. I clicked on "Computer" and
found that my "DVD CW" Drive ("E" Drive) was no longer listed.

I called Support and they told me that there is a known problem with
Vista. Certain software downloads are incompatable and can cause
the "E Drive" to be deallocated. I ran a Checkpoint Restore to get my
"E Drive" restored.

Does anyone know where one can find a current list of software that
causes this problem ? Is there any mention of this problem in the
Mircrosoft Support Site ?

[Woomera]

I dont know about any program that cause something like this.though i heared of viruses that might do things like this.
so i recommend you to first look for viruses on your machine.
then check device manager and see if the hardware completely disapeared.
if it wasnt in device manager you might wanna check the cables and if not take it to guarantee.

[Sonic]

It's known problem too on Windows XP, try this solution if problem occurs again.
http://www.msfn.org/board/index.php?s=&...st&p=629525
Be sure UAC is disable on your Vista (disable it in MSconfig / Utils / Disable UAC and REBOOT)