So here's the situation. I'm making a new PC and would like to us the 1tb hard disk from my old build in my new one. Normally, I would reformat in the process of installing my brand new OS on it, however here's the catch. I bought an SSD for my new build and would like to install the OS on that. My question is, how do I remove Everything on the Hard disk including the OS so that it is completely empty when i put it in my new PC, and doesn't confuse the computer as to which OS to boot to.