So, I've recently been getting this "The Windows 7 Home premium product key is invalid for activation" I wasn't getting this the first two weeks after I re-installed my Windows 7 home premium, so I assumed everything was fine. Then, I started to get this... I don't see why the key would be invalid, it's the key that's on the bottom of my laptop, and yes before anyone asks, my windows os before was windows 7 home premium 64 bit, like the one I have installed now. Any help?