I had similar illegal operations to BOAC when I upgraded to IE5.5 from IE5.0. Have since reverted to IE5.0 without any further recurrence. I run a Pentium I type machine and sometimes wonder whether the latest software releases are compatible with the old MMX type processors. So I'd try reverting back to IE5.0. I tried to use the IE5.5 uninstall utility thats supposed to put the old version of IE back, but this reverted me back to IE4 and scrooed up my outlook express so I'd suggest installing IE5 from a CD.