bcdedit /set loadoptions DDISABLE_INTEGRITY_CHECKS  Ok, I did this and it worked so I could install Rivatuner to check out some things with my video card.   How do I re-enable the driver signing if I want to get Vista back to where it started?  Substitute EENABLE for DDISABLE????? Thanks, Dave  So no one knows how to re-enable the driver signing????