I just upgraded to Windows 7 x64 RC (Build 7100), and I'm missing some drivers. I've looked all over the place, and I don't know where I'd find them. My device manager says I'm missing drivers for: "SM Bus Controller" and two other "unknown device" My motherboard is an Asus P5ND2-SLI, and as I bought it second hand, I don't have the driver CD with it. I went to the drivers on the asus site, but I don't know which I'm meant to install, and many of them didn't work that I tried. I tried to use a program I had luck with previously called "unknown device identifier", but it gave me an error and wouldn't give me a list of all my computer parts.