I have a Toshiba A105-s4334 notebook computer with the Mashita U841s DVD RW drive that came factory built in. The drive only seems to open disks that contain data (pdf, pics, etc.). When I put in install disks, they do not open. I try to click on the 'D' drive icon from My Computer, but it does not even show that a disk is in the drive. If I double click the icon, I get a message that says I/O device error. Can somebody please help! I need to install Office but can't get it on there. The note book came with XP installed on it. I later upgraded to Vista. The drive worked fine. Soon after, I had to do a factory restore of the entire computer and now it does not seem to work. I think I have tried everything I have read in other forums, but no solution.