Mr. Sithlord--
There could be a number of reasons, but by far the most common cause of this
symptom is found in software in the equation conferring some upper and lower
filter values that need to be nuked (not all of them are always there but it
only takes one) per this article:
CD-ROM drive or DVD-ROM drive appears to be missing after you install
Windows XP or Windows Vista Beta 2
http://support.microsoft.com/kb/320553/en-us
To back up your registry in seconds: File>Export>Radio button on lower left
(whole registry)>save to desktop>tuck in your favorite place folder, ect.
Method 1: Remove the registry entry
Warning Serious problems might occur if you modify the registry incorrectly
by using Registry Editor or by using another method. These problems might
require that you reinstall your operating system. Microsoft cannot guarantee
that these problems can be solved. Modify the registry at your own risk.
Note If you had installed multiple CD-writing software products on your
computer, you need to uninstall the software products before you remove the
registry keys. 1. Click Start, and then click Run.
2. In the Open box, type regedit, and then click OK.
3. Locate and then click the following registry subkey:
HKEY_LOCAL_MACHINE/System/CurrentControlSet/Control/Class/{4d36e965-e325-11ce-bfc1-08002be10318}
4. On the File menu, click Export.
5. In the File name box, type savedkey, and then click Save.
6. Click the REG_MULTI_SZ data type UpperFilters, and then click
Delete on the Edit menu. When you are prompted to confirm the deletion,
click Yes.
Note If this data type is missing, go to Method 2.
7. Click the REG_MULTI_SZ data type LowerFilters, and then click
Delete on the Edit menu. When you are prompted to confirm the deletion,
click Yes.
Quit Registry Editor, and then restart the computer
There are other MSKBs that are the remedy for problems much less
common and this is one:
CD-R drive or CD-RW drive is not recognized as a recordable device
http://support.microsoft.com/kb/316529/en-us
First one should do it.
Good luck,
CH
Have already tried this fix!! no mention of any upper or lower filters in the registry at all Hence the scan for hardware changes fix also mentioned in other post!!