I have a Toshiba Satellite Model 1415-S173. My computer picked up a Worm while I was traveling in Southeast Asia. The Worm went undetected until it started wiping out my computer. I rebooted the computer form the recovery disc and then preceded to reinstall my programs. I installed Encarta from a disc and then upon trying to install the next program my CD-DVD drive stopped being able to read any disc I put in it. I then ask my computer to troubleshoot the problem and it said nothing was wrong. Where do I go from here?