I had a problem last year with my new PC. I started with dial-up and 256RAM using AOL 8.0. I crashed every several days and spent more time with AOL techinal service than the law allows.
Finally I ordered another 256RAM memory and my problems disappearded immediately. Then I went to AOL 9.0 and then DSL, and had a few problems, but now I can trade, play games, read e-mails all at the same time with no problem. Unless my a/c unit cuts in and sometimes it cuts me out.