I installed ethereal 0.10.13 with winPcap 3.1 on my w2k_sp4. during the install I had killed or disabled various security apps. post-install I rebooted and turned everything back on in orderly fashion and started ethereal. it did a few bumps with kerio 2.1.5 but I worked past those, and then started ethereal capture and *pooof* blackscreen shutdown reboot. after reboot I closed various security stuff and slowly started one, ran ethereal ok, started another, ok, so I was able to narrow the culprit down to... ProcessGuard 3.150. I've tried various settings in PG and always ethereal crashes w2k with PG running. turn off PG and ethereal is ok. curious as I have run prior versions of ethereal with PG in the past with no problem. so something is new and different (apparently) in current version of ethereal. any ideas how to tweak this combo other than disabling PG. I disabled PG when I installed ethereal. sidenote I also installed sun java jre 1.5.0.06 today but no evidence that java is causing any problems.