CD and DVD drives undetected at Boot

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JoeTheOdd

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My windows XP computer won't detect my CD and DVD drives when I start up. I just shut down, uninstalled my second modem (it was for Linux testing), and started up, and they were gone. :(
 
This seems to be quite a common problem with XP. Try this fix :

Start Registry Editor - Go to Start-->Run, type regedit

Locate the UpperFilters & LowerFilters value under the following key in the registry:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}

Back up the entry first by highlighting the {4D36E965-E325-11CE-BFC1-08002BE10318}. Then go up to, File and select Export, enter any name you want and save it where you can find it.

Now delete 2 entrys within {4D36E965-E325-11CE-BFC1-08002BE10318}

Highlight {4D36E965-E325-11CE-BFC1-08002BE10318} and look on the right for the entry, "UpperFilters", right click on it and select delete. Now do the same for LowerFilters

Now reboot & scan for new hardware if XP doesn't automatically detect the drives.

If this doesn't work or goes wrong, you can just import the saved key back into the registry.
 
I may be wrong, but if it sees the drives but doesn't read the CDs or anything, it's the cable. Get a new cable or the cable's loose.
 
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