I tried this just now and here were my findings.
I disabled the windows paging file and then rebooted.
reboot went fine and all seemed normal.
I started the game (with UBI splash screen disabled)
the game started normally and i entered the London sight seeing tour ( Graphic settings on maximum with 1776x1000 res)
after load screen things seemed normal but then when i started flying around a bit i started noticing big flashes and graphic instability as things were rendering in the distance. The micro stutters were still there and it seemed to me that they even became a bit worse, but it was tough to tell with all the other flashing and craziness going on in the distance.
I then intentionally crashed into the bridge

and upon hitting escape the game exited to windows and then would not let me get back into the game and then locked up when i tried to end the program from the task manager.
I then set it the paging file back to the way it was and rebooted again.
restated the game and things were back to there normal micro stutter selves with good fps (same settings as above).
Thanks for the tip but for me this didn't seem to help
thanks again
cheers