When I close a window, my desktop shrinks slightly. This is more of an annoyance than a problem, but I understand there is a way to stop it. My system has a Riva TNT 16MB video card and Daytek 17in monitor.
You have either a poorly-designed/faulty monitor, or perhaps you just become annoyed easily. We think the problem is caused by poor power supply regulation. When an onscreen window shows a lot of bright white, the CRT's (cathode ray tube's) electron gun is drawing a high current and the HT (high tension) supply voltage drops. Closing the window replaces it with a darker background, so the gun draws less current and the voltage rises. This can cause a change in the picture size.
That's the explanation. Unfortunately, we don't know a cure - short of buying a better monitor. However, by lowering the refresh rate (from Display Properties, Advanced settings), you will make life easier for the monitor, and this might make the effect less noticeable. See also tip Shaky monitor picture
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