I have a Toshiba Satellite A105-S361 that is currently running Windows XP Home. I want to upgrade this laptop to Windows 7 Home Prem but I cannot get the laptop to boot from the dvd drive. I have went into the bios and changed the dvd drive to boot position one. I saved the configuration and restarted the computer but it does not boot off of the dvd drive. It bypasses the dvd drive and boots into Windows. I then restarted the computer and pressed F12. This allows me to pick what drive I want to boot from, I pick the dvd drive, it bypasses and boots into Windows. I then took the hard drive out. Now it boots to the dvd drive. So, I know the dvd drive works and my Windows 7 disk is good because it will boot to the dvd drive as long as I have the hard drive out of the computer. If I put the hard drive into the computer I cannot boot to the dvd drive. I would appreciate any help with this problem. Thanks you very much!