powerbook 3400/200 OS 8.6

[THE ROCK]

Does any lister know whether there is a conflict between Os 8.6 and I.E
5.1.6? I can't launch I.E under O.S 8.6. The launch process is never
completed. The computer freezes, making a strange buzzing sound. I did
not have problems when I ran the powerbook under OS 8.1. Sometimes
netscape 4.79 also freezes, with the a fore mentioned buzzing sound, on
some web sites. I have 48 megs. Could this be the problem? (Anyway I
just ordered 128 megs).
TIA for your help. I'm going crazy.
Peter.