To try and troubleshoot why your computer is not recognizing your CD or DVD drive, you may want to consider the following steps:

1. Check Your Computer’s BIOS Settings: Make sure the drive is recognized by the computer’s BIOS.
2. Check For Connections Issues: Check all the connections to the drive, cables, power supply, etc.
3. Check the Drive’s Firmware: Download and install the latest firmware update for the drive (if applicable).
4. Check your Operating System for New Updates: Check for regular system and device driver updates that may help resolve the issue.
5. Clean the Disc: Try and clean the disc that you are attempting to access in the drive with a soft cloth or cotton swab.
6. Double Check Compatibility: Make sure the disc media you are attempting to use is compatible with your drive.