How to Disable Driver Signing in Windows Vista X64 Background Information In Windows Vista Microsoft introduced a new kernel security component for the 64-bit editions of windows. Windows mandatory Kernel Mode and Driver Signing states that all modules or drivers designed to run at kernel level have to feature digital signatures. This is designed to increase the security of 64-bit Vista by requiring that the kernel level software is provided by a legitimate publisher. Why you might want to disable driver signing. The reason I disabled driver signing is so I could install up to date chipset and graphics drivers for my laptop. AMD does not provide chipset or graphics drivers for laptops using Windows Vista, the only way to get these drivers is from the laptop’s manufacturer. Usually these drivers will be old and outdated. However it is possible to modify the drivers for desktop computers so you can install up to date drivers on your laptop. Doing this breaks the digital signature on the drivers causing them to be rejected by 64bit editions of Vista unless driver signing is disabled. Things to consider before you disable driver signing. Driver signing was designed to stop unauthorised programs and drivers from interfering with the windows kernel, your computer could be seriously at risk if you install drivers from a non trust worthy source. If you experience system instability or random crashes after installing an unsigned driver there’s a good chance this driver is that is causing it and it would be a wise move to remove it. How to Disable Driver Signing It’s quite simple to disable driver signing, all you have to do is load up command prompt. This can be done typing cmd in the search box and pressing enter, or from the shortcut in the start menu. Once in command prompt just type in: bcdedit /set loadoptions DDISABLE_INTEGRITY_CHECKS and press enter. Now re start your machine and you will be able to install unsigned/modified drivers, be sure you trust the source of the unsigned drivers you are installing.