In reply to Moving my OS C: drive to a new motherboard? since it was closed I wanted to comment a few things TorrentG said that is best method but Acronis will also clean install an image to a different Mobo just for reference. I wouldn't do that myself cause the If's but in a real time emergency needing to recover files or something then things have to be done. There was all this mess about EULA and it is mostly true but from the looks of it that was not an OEM which is tied to a specific computer, looked to be retail with his Mobo. WAT(KB971033) will kick in if installed and start telling them that they need to activate. OK, with that said I can update my PC all I want but I may have to call Microsoft to activate it, same Hard drive but new mobo and ram don't break the Eula. You are allowed to upgrade your stuff. If that don't sit well with you and the EULA then when you pull your old Mobo out hit with hammer and then call MS. I have done 100's of install to same PC both in VM and real time and it is allway's activated when I hit the desktop but I bought and run an nice OEM for that reason. SLIC 2.1 Bios and the right key and it's a done deal. Thoughts, Comments ?