Formatting ssd with Win7 OS?

Hi guys, im fairly a pc nub i guess you could say and can probably tell by my following question, i have a 2Tb HDD and a 120GB SSD, i obviously installed my OS on my SSD but i installed like every other program on my ssd forgetting i HAND installed my 2TB drive shakin my head. anyway i wanted to format my SSD but i cannot since my OS is on their it will not allow me, my question is how do i uninstall win7? This was a fresh build all new parts and a copy of win7 meant for a new computer if any of that matters, thanks guys.

Or can i format my SSD without having to remove my OS from the drive at all?