You have closed some programs, on a secondary monitor, that remember their position. When you move the position of the secondary monitor, those programs may open outside the viewable area.
This will happen with programs that are NOT 'multi-monitor' aware. Microsoft Office 2000 programs are 'multi-monitor' aware, but WinZip 7.0 is not.
To prevent this from happening:
1. Move the secondary monitor to its' original location.
2. Open the program.
3. Move the window to the primary monitor.
4. Close the program.
5. Reposition the secondary monitor.