My main board is an asus m4a87td-evo. My hard drive is a WD Green 500GB Sata drive. My hard drive is a piece of the computer, therefor my hard drive may be referred to as an asus m4a87td-evo.
You mean Linux, the Raspberry Pi's operating system is Linux, also, no it should not delete Windows 7 if done correctly. I recommend back it up with an external harddrive :)