Utilities like DVD Drive Repair can help reset registry settings if the hardware is fine but the software is blocked.
The most common cause on Windows 7 64-bit is a in the registry. This free fix solves it: dvd cd rom drivers for windows 7 64 bit free download
This specific error usually appears during a Windows 7 installation from a USB flash drive. Utilities like DVD Drive Repair can help reset
If you still want to download something to fix your drive, here are the only legitimate, safe, and free methods. here are the only legitimate