I have had to re-install 7 twice already and am about to have to perform a third fresh installation. Each time the following has occurred. Installs fine, works fine, then mysteriously I get BSOD (bad pool header) on boot that cannot be resolved with system restore or repair. The first 2 times I had several culprit drivers/apps but I on this third crash I thought knew what the cause was and thought it was the most likely suspect for the first 2 crashes. Each time, I get the BSOD after I have installed the Netflix online movie player. This involves a Silverlight installation. HOWEVER, low and behold it turned out to be a program called "My Lockbox". Do not install this program!! It has known BSOD issues with vista and wrecks 7 as well. Be warned.