http://blogs.technet.com/brad_rutkowski/archive/2007/08/07/vista-and-2k8-enabling-debug-mode-on-boot-up.aspxPre-Vista it could be an issue if you didn't have debugging turned on via the boot.ini file and your system stopped booting. Well in Vista and 2k8 you can enable "Debugging mode" on boot by hitting F8 after POST. You can also turn off driver signing verificationenCommunityServer 2.1 SP1 (Build: 61025.2)