I was experiencing an error during an installation of Trixbox 2.6.2.2 whereby it would lock up with a blue screen after the keyboard language selection / probing video card steps. Initially I thought it was a faulty CD, but after burning 3 copies with 2 computers, I would get the same problem every time.
This thread had some more info, but in the end I fixed it by disabling the machines secondary hard drive.