Pretty much everything I could get from the device manager was
Driver Instance ID: ACPI\ATK0110\1010110
Windows update did not know anything about this mysterious device, so the only thing I had left to do is google for the device instance ID. Of course, I was not the first one to face this problem and the solution came up fast here and here.
The only thing you have to do is insert the bundled MB driver CD and do nothing else. It turned out that ASUS has an ASUSACPI.exe utility set to autorun. I wouldn't call this solution sleek or elegant in any way, but it works. Most of the time ;)
For everything else, there's google. (Reminds me of a pic where Bart Simpson was writing "I will use google before asking stupid questions" all over a blackboard)
