Impressive!
This is true work of art. The use of the Windows system as a ground for a fight between basic stick figures is really nice. Although the style has been done before, you have given it a new birth with using Windows. (Its about time Windows was hit a little in the mouth anyway.)
I think you should make more, but instead, allow users to choose how to fight the animation.
For example:
Option one: Go to anti-virus.
Option two: Try to catch it with the mouse and slam it against the wall.
Stuff like that. Just to get some more interesting results.
Good work; keep it up!
Ayien