GuardedID® uses the Windows driver signatures to be certain that your kernel is intact. If this message is reported for a Microsoft driver like “i8042prt.sys” for Windows 7, the issue is likely due to Microsoft update KB3004394. Copy and paste http://support.microsoft.com/kb/3024777 into the address bar of this browser for more information.
Otherwise a disk error or software error (again, not connected in any way to GuardedID®) has damaged the Windows catalogs. In this case see http://technet.microsoft.com/en-us/library/cc734083.aspx.
If the driver is not a Microsoft driver, it is either an old, unsigned driver (contact the device vendor for a current, signed driver), or a rogue driver that should be removed before using the computer for sensitive operations.