What JBI said. Also, if you're having problems with your media, Microsoft does make the media for all versions of Windows Vista and 7 freely downloadable via DigitalRiver links. If you've got a good serial, that's all the rest you'd need. If it's an OEM machine, that came with Windows 7 preinstalled, you may have a restore partition you can make use of, as well.
Razorback - Arch-6430U - i7-3687U - 16GB - Intel HD4000
Rocinante - Ubuntu-E5530 - i5-3230M - 16GB - Intel HD4000
Donnager - Arch-M4800 - i7-4800MQ - 32GB - Intel HD4600/Quadro K2100M
Vargr - Arch-Vargr - i7-4790K - 32GB - Intel HD4600/GeForce GTX 970