i have this issue too, spoke to access for months trying to sort it out and in the end they could not do anything.
i bought a new SSD for the PC, PCIe USB3 card, used 5.1.1.0 and 5.0.8.0, re-installed windows 7 pro 64 bit and even got the new version of cubase 8 and still every time i load it up it blue screens.
it worked fine before but now after all the attempts to fix, rolling back and then using beta my machine is well confused and i have given up, my virus ti2 sits in the corner of my studio collecting dust.