A friend of Mine's AOL is crashing with this error:

WAOL caused an invalid page fault in
module KERNEL32.DLL at 0167:bff7b9a6.
Registers:
EAX=00000000 CS=0167 EIP=bff7b9a6 EFLGS=00200246
EBX=8338b08c SS=016f ESP=03d5fa20 EBP=8338b078
ECX=c15bd7e0 DS=016f ESI=8338b08c FS=0d97
EDX=00000000 ES=016f EDI=0000019c GS=0000
Bytes at CS:EIP:
ff 76 04 e8 13 89 ff ff 5e c2 04 00 56 8b 74 24
Stack dump:
00441e4c 7f88de25 8338b08c 03d5fa58 702783e8 702783e8 03d5fa94 00000000 70241b60 00441e4c 03d5fa54 702783ec 00000000 00000670 03d5fa7c 7022c607

I know this is common but I can't remember why . anybody know?