Thats it! It used to run perfectly on this system, As did ProX3 and 2 before it. No hardware changes on the system, nothing happened apart from usual Windows updates.
When I try to start it a Windows error box pops up with that error. Tried to reinstall - do dice. Also tried to install trial of Pro X5 and that will not start either.
Premiere Elements 11 works though, so nothing wrong with the video subsystem of my PC I reckon.
Using Windows 7 Ultimate 64 bit and Asus GTX260
Cheers
James