Here is the case. I am sure that some one here has been there done that. I bought 2 legit keys, one for a 64 bit windows 7 machine and one for a 32 bit laptop. Without knowing that the upgrade DVD is different for each computer, I used the same DVD burned from the 64 bit machine to upgrade the 32 bit laptop. Now the laptop is activated with a 64 bit windows 8. What should I do if I want go back to 32 bit on the laptop, besides using the proper upgrade DVD, do I have to do phone re-activation? Thanks ahead.