Probably will not work due to differences in the 2 systems -- One option would be to download an OEM win7 iso ( Official MS download source links can be found HERE ( http://www.mydigitallife.info/official-windows-7-sp1-iso-from-digital-river/ ) and format the hdd and install win7 (using the key on the laptop - since the OEM license is tied to that MOBO and will reactivate ) -- as mentioned if you want to switch back to vista it will require a new license since the old OEM license for VISTA is tied to the MOBO of the other laptop not the HDD.