Computer Won't Read Windows 7 Disk

I'm trying to reformat my computer with the original windows 7 disk but i'm having issues. when i insert the disk and i go to "My Computer" it doesn't show up as a windows 7 disk and has no folders or files when i 'explore' it. i checked the device manager and it shows the dvd rom is working fine, i updated the driver anyways and it said it was already up to date. after i tried rebooting the computer and it doesn't give me the option to 'press any key to start disk' that it normally does. i went into bios and set it to where the dvd rom was first priority followed by the hard drive (nothing), then made it the only priority with all others disabled. it then said "insert disk and press enter", i pulled the disk out then put it back in but it won't boot. i made sure the disk drive was working by inserting another disk in it and it worked fine and booted up and everything. then i tried putting the windows 7 disk into another computer i have and it also booted up normally and worked fine.