
Driver Signing
Driver signing is not intended to caught security or other flaws. It is just a method to make sure the driver is really from the vendor, and has not been tampered with by a third party (think CRC). You can turn off driver verification temporarily if necessary - if you're the developer testing the driver, for example, or the vendor hasn't certified that a new driver for a new OS will work for an old GPU even though it will (great way to sell new GPU's, isn't it, NV*****)..