You don't say how much of your resources are in use at any one time - how much HD space you have free; how much of the RAM is freely available (check in System Configuration).
Have you checked Device Manager for any conflicts?
Have you done a Scandisk lately to identify disc/sector errors?
Have you cleaned out Temp Internet Files and emptied the Recycle Bin?
Have you checked for viruses and the like?
Have you considered upgarding to 98SE? or other os?
Have you installed any MS patches to your basic 98 configuration?
Just a few thoughts. You original post was only raised about 11 hours ago. Give us time to look into your problem.
And remember, this is the holiday season and we are all volunteers here!
Mike (I'm off to the country for some much needed r'n'r' myself now.)