If that doesn't work, run a registry cleaner (CCleaner is a good one - available @ filehippo.com). If that doesn't work, try reinstalling 98SE, or upgrade your OS.
I posted this on this past Friday and got 3 replies, however, none was quite the answer but all had one central theme. When I put this computer in my grandaughter's room 4 months ago, I installed AOL as this computer as well as the 2005 model with XP are both on the same phone line. I asked AOL tech support if I needed to install a separate anti-virus and firewall on it. It had sat idle for several months while I decided whether or not she was old enough to operate. They told me no as they were both on the same phone line. It worked good at first and suddenly Power DVD started acting up. I added 64 MB memory stick and it got faster for a little while and I added the McAfee anti-virus and firewall off AOL and Spyware Protection. Spyware Protection made one scan and never worked again, PowerDVD all but quit and I started getting crazy messages and freezing up. After I posted, I got rid of Aol, loaded People PC and System Mechanic Pro 6, and it got better immediately. The only problems I have now is Power DVD isn't working right and I am unable to install anything else to the desktop. I have unzipped files 867 times and no go. What next?