I'm building a PC with a 500gb SSD. I wanted an additional 1 terabyte of storage for it, but didn't want to pay any more money for a hard drive. Luckily, I have a HP prebuilt that has a 7200 RPM hard drive. This computer stopped working because the CPU got damaged, so I decided to salvage the hard drive. The only problem is, the hard drive has a windows install on it, and when I build my PC it will boot directly into this windows install. Additionally, this hard drive has a few viruses on it. What I need to do is wipe this hard drive clean before it goes into any sort of computer, but I'm not sure how to do that. So, how do I wipe a hard drive that isn't connected to any computer? If that isn't possible, is there a way I can stop my computer from booting into the install of windows that is on the hard drive and releasing the viruses?