Windows explorer invalid page fault when closing a window.

I get a invalid page fault error every once in a while when I close a window explorer shell in Win98 2nd ed. with the following error:

XPLORER caused an invalid page fault in
module KERNEL32.DLL at 0167:bff9db61.
Registers:
EAX=c00309c4 CS=0167 EIP=bff9db61 EFLGS=00010216
EBX=03e0ff88 SS=016f ESP=03dcfe18 EBP=03dd00b4
ECX=00000000 DS=016f ESI=03dd0204 FS=1187
EDX=bff76855 ES=016f EDI=03e0ff80 GS=0000
Bytes at CS:EIP:
53 8b 15 e4 9c fc bf 56 89 4d e4 57 89 4d dc 89
Stack dump:

Any help would be appreciated. Thanks.