Model: CRW-1622 ONLY
Operating System: Windows 95 & Windows 98 (Note: might work with other versions of this os.)
Firmware upgrade to version D4.0
"Self-extracting file for Windows 95, Windows 98 and Windows NT. Extract these files to a floppy diskette or a temporary folder on your hard drive and follow the instructions in the Readme file.
This firmware upgrade will enhance the drives' compatibility with newer BIOS versions and fixes a problem that may occur when playing back CD's on the CRW-1622. It also removes the C1 pointer, allowing discs to be read on newer multiread Toshiba drives, and may help other drives read discs written with the CRW-1622.
WARNING!! Follow the included instructions exactly. Failure to do so may cause your drive to become inoperable."