This Chinese based site is selling illegal downloads of Microsoft Software, MSDN versions or volume licenced versions which are not intended for retail users. As such, your software will most likely come up with a "Not Genuine" message when Microsoft get round to blocking the key you used to install there software. See an example here: http://social.microsoft.com/Forums/en/genuinewindows7/thread/d6ffc421-e421-45cb-9b59-25e89aafbefa