here is some things you can do.
1: make sure you aren't running any other program while you are in Microstudio. This can eat up cpu usage.
2:disable your Screen Saver.
3: make sure your disc and drive are clean as they can cause glitches too.
Other than that I can't think of anything short of maybe upgrading your computer but I figure you might be looking for something that won't cost an arm and a leg.
Admin may have other suggestions.