1. Remove UPPERFILTERS and LOWERFILTERS entries from registry. See http://support.microsoft.com/kb/314060
2. Drive died. That happens. Replace it then.
I'm using a HP Presario V6000 with Vista which has been working fine for about 1 year. I've been able to play and burn cds. But when I now insert a cd, nothing happens at all. When I open/close the door the green light illuminates. I've also tried to see the cd drive in My Computer, but it isn't listed.
I've gone to the HP help centre and re-installed the drivers suggested but nothing changes. Someone suggested I may have a virus, I run Norton and can't see any problems there.