Problem: Marlett font problems-messed up close/open/minimize buttons

That may be caused by a corrupt font.
The Marlett font is used to display the close, open, minimize, and other window control buttons.
Microsoft has a knowledge base article on this at

This article is aimed at windows 95, you should be able to use the system file checker to restore it in windows 98.
Click start | run and key sfc.exe and click OK.