I have installed Windows 7 on my D:\ drive. I have placed a NEW installation on my C:\ drive besides it. See the attached image. I ONLY use the W7 on the C:\ drive now, so I want to delete my D:\ partition completely (416GB). HOWEVER, I see that it is labeled: "System, Active, Primary Partition". Can I just format this drive and will my PC still boot or do I have to take particular steps? Thanks!