So I bought win7 and got two links for 32-bit and 64-bit win7 installations. I downloaded the 32-bit version, installed it and activated, but now after two years I'm migrating to new hardware and I want to know proper procedure to successfully migrate windows activation key from one machine to other? 1) Do I need to deactivate the key on old machine or simply format old HDDs and simply install win7 on the new HW and activate? If deactivation is needed - some instructions would be welcome... 2) I need to switch from 32-bit win7 to 64-bit win7 since I'm upgrading from 4 to 8GB RAM. Does this have any impact on migrating procedure (Other than using the 64-bit installation)? Any other advice on the procedure?