I posted this on another thread as a followup but I am posting it again new so that it attracts attention. I got the disk C: formatted and set active with fdisk off of a WIN98 Floppy Bootdisk, I have made a disk with the following files: Autoexec.bat / Command.com / Config.sys / Duse.exe / Duseldr.com / emm386.exe / himem.exe / and mscdex.exe I have Autoexec.bat set: duseldr a:\duse.exe MSCDEX /D:USBCDROM /S /M:15 /V I have Config.sys set: device=a:\himem.sys devicehigh=a:\emm386.exe dos=high,umb The disk boots fine but a window pops up and says Dectected USB Storage Device, Failed To Load USB Storage Device. I can unplug it and it recognizes that I am removing it, and also when plugging it back in...any suggestions? It is a Memorex Ultra Speed CD Recorder manufactured September 2004, Model# MRX523252AJEL-1. It did not come with drivers. I am using Duse 4.4

http://business.virgin.net/x86.computers/usbcdrom.htm

Downloaded the file you suggested, loaded fine but came back with an error that Target USB device not found. Any other suggestions?

Unfortunately it would appear you have an unsupported device, I have found many optical and hard drives which will not handshake with USB DOS Driver Software. Panasonic list DOS Drivers, therefore as they are actively developing the drivers, above version on download is 2.20, it would make sense to buy a CDRW/DVDRW from Panasonic or a Generic make which uses their products.....