Optiplex small form factor 64 bit won't run without 3D accelerated graphics

Hi,

I’ve just tried to run a 64bit version of 2.76 and the error that loads stating it needs a 3D accelerator. The program does load, but the game engine won’t function. It did work the first time it loaded.

I have a number of games on here, well half of what I have on the old system that will run on here.

What could be causing the error? The system runs a Q45 integrated chip from Intel. So no real great graphics.

Just to note, it does run, but only after a switch on of the system. So have to save, and don’t close while using blender. Strange. I guess I can still use it.