Des said:
Hi. This is unusual. I boot up the PC and find in my computer that
the DVD drive (E) is missing. If I install a bootable CD, nothing. If
I boot into the Bios setup it is there. If I re-boot the PC it asks
about booting from the drive. I can boot from the drive (Norton ghost)
no problem. Just does not want to apear in my computer.
Windows XP Pro
Motherboard: M3N78 Pro.
Any sugestions. Also pluged in an external HP dvd writer. Visible in
bios only.
Desmond.
Optical drive problems can be caused by certain programs (like
burner programs) that install upperfilter/lowerfilter entries.
The WinXP groups have a couple questions like this per day, where
people have lost the ability to use an optical device.
http://support.microsoft.com/?id=314060
This is an example of a simplified registry batch file, called cdgone.reg.
It is an example, of what they're trying to delete. I've seen scripts
three times this big, also offered for download.
REGEDIT4
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}]
"UpperFilters"=-
"LowerFilters"=-
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Cdr4_2K]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Cdralw2k]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Cdudf]
[-HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\UdfReadr]
That is just an example, to illustrate what the fixes are trying to do. There
is more than one GUID possible, so some scripts have more than one
line of the "4D36E965..." type in them.
Not all upperfilter/lowerfilter entries are bad. Some people are too
aggressive when using regedit, and they delete the entry associated
with the keyboard. The result in that case, is the keyboard stops
working. Naturally, that is a pretty serious thing to screw up.
So don't go overboard, when trying to fix the problem (especially
manually). With some luck, a Microsoft FixIT tool, may be able to
do it right.
Paul
