I am used for Windows 7, and i bought on my Toshiba laptop and since i have an installed on my UltraISO software. When i right cilck on the .iso file and go to Ultraiso > Mount to drive appears when i don't change the drive but it is unmounted. I can go to Start and then Shut down > Log off appears and back to the normal startup again, and you may see a blue question mark over my drive when i click on the My Computer icon on Windows 7. Any problem to fix this drive to do it?