Ok after a little experimentation i have the following results...
I have turned down my graphics options and set resolution to 1024x768, it was running good before but i changed em anyway, i also turn off shadows in game.
I can select a stryker, there is some lag and the game freezes for a second but after that i can issue commands and stuff and i have even moved the IFV over a few turns no problem, i can now also select infantry about 50% of the time with no crash but the INSTANT i click move the game hangs.
Im totally baffled by this andtbh if i didnt love the look of the game so much i wouldnt even bother, please fix this!
Anywho back to CMBB...