It's a strange one! do you have a spare HDD that you can try a fresh installation of windows on? If you've exhausted every other avenue.
Yes I do but have to do it later. thanks for helping anyways.
When you do the above just have your monitor connected to one of the green DVI outputs
no mate Kaapstad
In my main rig I have 2 gtx 690s but what works for 2 works the same for 1 gtx 690, I often turn one slot off for benchmarking and run on one gtx 690.