I've run all of the system utilities I can find & can't find anything wrong. The device manager indicates the CD Rom is working fine & shows no other device conflicts. I tried to find another driver but Windows says I have the best driver already installed. I recently did the following to my PC......installed software (from CD-Rom) to link a Zire 72 PDA. That was on 1/1/05 & it went fine. I also burned a few music CD's a few days later & that went well too. Last weekend, I submitted a "hijack that log" file to this forum for another issue I was having & made all of the suggested changes. I have not noticed any other issues with my computer operations. I have no idea if either of these could have affected my system but wanted to mention it before troubleshooting begins. Any help would be greatly appreciated.