I can't get rivatuner 2.05 to work with 163.71. I have a XFX 8800 GTX card and vista 64bit. When I run rivatuner I get following messages: 1, windows is demanding a digital signed driver 2, can't load Rivatuner64.sys driver (but its where it's supposed to) 3, driver signing enforcement must be disabled in order to start rivatuner under vista 64bit. When I reboot the system I get the same message. Am I doin something wrong?