Typical vista problems at zak.

I've been on at least 5 zak runs since a little after this thread was posted, and the changing graphics thing works fine.

Windowed mode has absolutely nothing to do with it though.

It's better to do the changes while in full screen because window mode uses more memory and could cause a large lag spike. Emphasize could. What my wife does is change the graphics a notch every "segment" starting at the last zak arm. She has yet to dc.