Invalid Page Fault in Explorer 5.5

Hello

Running Win98 on Toshiba 333 Laptop getting invalid page fault errors on a fairly regular basis in Explorer 5.5. Also experiencing numerous freezes in explorer while scrolling through sites.I use the laptop regularily and have a fair bit ofeverything on the system but cant pinpoint when the problems began. Ive run Norton Utilities,cleaned out temp files ext. but cant pinpoint the problem. Thank in advance, following is the errorr i recieve.

IEXPLORE caused an invalid page fault in
module SHLWAPI.DLL at 0177:70bd1a1a.