Plutonium

Dss0 once this freeze occurs, i can't do anything with mw3 and plutoniim bootstrapper except close them out

im brand new to pc..so im already lost as it is.

i got Blackops 2 up and running with Plutonium and it is beautiful.

ive tried to do the same with Mw3, but when i change graphic settings in the menus and click "apply", it refreshes the image, and my
in-game cursor is still on screen, and my mouse cursor is also on screen.
when this happens, i literally cant do anything.

what am i doing wrong?