Using Device Manager
1. First try updating the driver in the Device Manager. To do this, click the Windows 'Start' button and right-click 'My Computer.'
2. Click the 'Properties' to open the System Properties window. Click the 'Hardware' tab and click the 'Device Manager' button.

3. Scroll down and identify the CD or DVD-ROM drive with a yellow exclamation mark.
4. Right-click the drive once you have identified it and click 'Update Driver.' Follow the guided prompts to update the drive and restart your computer when the process is complete. If that does not solve the problem, move to the next section.
Using the Registry
5. Click the Windows 'Start' button and click 'Run.'
6. Type 'regedit' (Without quotes) and press 'Enter' to open the registry console.
7. Click the 'HKEY_LOCAL_MACHINE' folder on the left panel and click 'SYSTEM.' Click 'CurrentControlSet' and click 'Control.' Click 'Class and click the '{4D36E965-E325-11CE-BFC1-08002BE10318}' key. Delete the following entries if they exist under this key: LowerFilters, LowerFilters.bak, UpperFilters, UpperFilters.bak.
8. Click 'File' and click 'Exit' to close the registry console. Restart your computer.
9. Double-click 'My Computer' on the desktop after your computer has restarted and verify that your CD or DVD-ROM drive is visible. You should also check the Device Manager again to see if the exclamation mark has been removed from your CD or DVD-ROM drive.