First of I want to say hi and thanks again to Arachne and Kerry for helping me out on the last problem I had with my CD/DVD burner the Optiarc DVD RW AD-7190A 1.05 (was 1.01) They are great! Maybe another silly question (as the last one was just a firmware update) But here goes. My wife is taking a computer course and we have use a book on cd that came with the course book. (Oh and this was before the firmware update and is still a problem) I work perfect the disc installed on my computer and also on her flash drive. after awhile though the program stopped working, I thought it was some problem with the DMA so I checked the event viewer and all I get is: Faulting application bookoncd.exe, version 126.96.36.199, faulting module unknown, version 0.0.0.0, fault address 0x01571040. ....It will not run from cd , hard disc or flash drive now. Other programs still work from cd player, hard disc and flash drive, any help would be much appreciated.