The optical drive is missing from My Computer, but shows in Device Manager with a conflict.

Follow this procedure to remove the upper and lower filters from the registry to troubleshoot and resolve the condition where the optical drive is missing from My Computer.

WARNING: There is a risk of data loss. This procedure involves editing the Registry. Using the Registry editor incorrectly can cause serious problems that may require the operating system to be reinstalled and can result in the potential loss of data.

IMPORTANT: A backup of the registry should be created  before proceeding with this procedure.

1. Point to (but do not click) the lower-right or top-right corner of the screen, and then click to select the Search charm.

   NOTE: The Windows Logo + Q key combination will also take you to the Search screen.

2. In the Search screen, in the Search field type REGEDIT, and then press the Enter key.

   NOTE: If prompted for an administrator password or a User Account Control prompt is displayed, type the appropriate password, or click Yes.

3. In the Registry Editor window, in the left pane, double-click the HKEY_LOCAL_MACHINE folder.
4. In the HKEY_LOCAL_MACHINE folder, double-click the System folder.
5. In the System folder, double-click the CurrentControlSet folder.
6. In the CurrentControlSet folder, double-click the Control folder.
7. In the Control folder, double-click the Class folder.
8. In the Class folder, click to select the {4D36E965-E325-11CE-BFC1-08002BE10318} folder.
9. In the right pane, click to select the UpperFilters registry value.
10. On the menu bar, click Edit.
11. In the Edit menu, click Delete.
12. In the Confirm Value Delete dialog box, click the Yes button.
13. In the right pane, click to select the LowerFilters registry value.
14. On the menu bar, click Edit.
15. In the Edit menu, click Delete.
16. In the Confirm Value Delete dialog box, click the Yes button.

    NOTE: Do not delete the UpperFiltersBak or LowerFiltersBak registry values.

17. Close the Registry Editor window.
18. Restart the computer.