Thought you were looking for what bit is your version, I used the program to find out that my operating system is a 32bit if you need help figuring out where to find what your looking for, ask
then you have a dead stick of ram. Now is this the cause of your MW2 not running smooth, I don't really know, but it will make it a tad less responsive. Now you should try to figure out which stick is dead and replace it
Look for little black burn marks allong the copper/connectors.
and/or
Pull them all out (when pc is off) and put them in 1 by 1 (put 1 in boot up, if its ok power down repeat step).
When the one that is wrong the pc either makes a couple bleeps, or wont power up.
