Wow. I thought AOL was a fossil, ergo, dead. :-))
Truthfully, I'd be surprised if you get an answer because of how dated it is.
I bet it's your computer, however, you never know. Some software you updated may be putting a drag on your system.
That said, you may find that the newer browsers will give you what you need. I use Firefox and it has a built-in spell checker so that when I'm posting here on the forum, it points out my typos for me. You may wish to give it a try. Hopefully, your computer isn't too outdated or it may not work as well as you like.
Which browser are you using?