Uuggh, my brothers computer is giving me a hard time. When it boots it hangs on Mup.sys. I tried replacing the file, restoring the registry, and renewing a previously working state but none of those worked. I tried several Windows XP disks but they all hang after the "Press F* to install custom RAID drivers" so I can't run chkdsk. I tried going into Ubuntu and running ntfsfix but that did nothing.
I don't know what to do now. The Windows XP disks don't work and I can't get into Windows, I don't know where to go from here.