Windows 7 Evaluation copy. Build 7100 This copy of Windows is not genuine I haven't installed any new hardware or anything.

Well, of course, it's Windows 7 RC (Release Candidate). Technically, the evaluation period has expired and that version of Windows 7 is no longer supported. The current version is 7600 or 7601 with Service Pack 1. Visit here: http://www.microsoft.com/en-us/howtotell/default.aspx for more information. You do not have a system that is safe and reliable at this point. Be very cautious, backup your data and installation a new version. Be sure to clean or wipe the hard drive first.