This is a huge violation of Microsoft EULA for the software described, unless you're holding the original retail disc + licenses. OEM software is not transferrable officially, although in limited situations you can call Microsoft and have them re-activate it on replacement hardware (I have had to do this on a couple occasions where for example an HP or Emachines system would have multiple failures of PSU/Mobo/HDD, and I installed standard but not original replacement parts, and then reloaded their OS reflecting the OEM license sticker on the case).
FWIW, do what you want, but be aware that this is frowned upon by Microsoft as well as the standards of this forum. Personally I wouldn't say anything else about it here.