These are the steps needed to get your TSST TSL462C CDRW/DVD back after you accidentally deleted/ejected it :
1. Uninstall the problematic driver (yellow question mark) on your Device Manager.
2. Reboot your laptop
3. Go to regedit and delete these keys :
4. Reboot your laptop again.
5. You will find your CDRW/DVD-ROM back for you.