I have been having trouble for quite some time with my computer slowing down at start up, can take more than a few minutes sometimes, and when I try to open a program, i.e. MS Word, Yahoo Messenger, AOL sometimes the program will open right up and sometimes it may start to open an then just stop. When I hit ctrl alt delete it says program is not responding so I end it. Then re-open it and most of the time it will work.
I am running Windows 98 SE. on my Gateway with a Pentium III processor.
I have run all the normal Ad Aware, Spybot and Avast antivirus programs. Sometimes ad-aware finds things and I delete them, the same for Spybot. Avast says there are no viruses found. I've done system defrag, disk clean up and scan disk as well.
Sometimes Internet Explorer will lock up when you go to open a web page or if I am on one and click on something it just freezes or may take forever to open the next page, so I started using AOL Explorer as this seems to work better for the most part.
Any ideas as to why I keep getting these none responding messages?

Let me know.
Thanks,
Ira