Wasn't sure if this should go under Win7 or CPU forums. Was about to put an upgraded CPU (Phenom 945) in my Win7 Dell Inspiron 570 (Sempron 140) and noticed in the Uber Upgrade post on Dell's forum that Kisianik talked about reinstalling the OS after the CPU upgrade. He was upgrading to an overclocked Phenom 965 so I wasn't sure if the reinstall was required for all CPU upgrades. Anyone know?