SATA drive

So I have two hard drives and two DVD drives, and I wanted another hard drive. I got a SATA one, and installed it just now, but Windows doesn't recognise it. What to do?

In before stop using Windows.

OP, can't you just return the drive (or sell it off via ebay/craigslist) and get that external drive?  It sounds like you're up against a weird incompatibility and it's probably not worth your time to chase it down.