mouse stuttering help needed pls

I have a microsoft intellimouse 1.2A PS/2 mouse, it has worked fine for the past year but these past couple days it has been stuttering around the screen, for example i move it around and it freezes for a half second and moves again...this happens at random times. I tried cleaning the inside and it still does it. I looked at my RAM and it said 74%, and I only have aol, yahoo messenger, IE, stillimage, hotkey (keyboard), wmexe, starter, taskmananger, and windows explorer open.

-Could it be my RAM?

I doubt it's the ram, it's most likely the mouse itself. I'd try cleaning it really thouroughly, here are some good instructions:

http://www.radiosoundbytes.com/mouse/step01.htm

this does not sound like a dirty mouse. a dirty mouse will
still move the pointer, it just will not go in the direction
where it hits the obstruction. you can start by going to
control panel, and double click the mouse icon... you can
adjust the pointer speed, etc... if that doesn't help, it
might be something within the software environment.
such as running a program that your computer only meets
the minimum requirements for. the system is busy trying
to do something .