So after a few months of suffering, I’ve rolled back update 1809 and my Aventail VPN is working again. The annoying thing was the connection would open for about 30 seconds and then Windows would go into a hard crash and do auto reboot. After a few Google searches I finally found this:
and the VPN is a specific split tunnel configuration. I have another client using SonicWALL which was unaffected.
I guess I am only doing Hotfixes until the next major Win 10 update comes out. Hopefuly, they fix this. I sent them at least 10 crash dumps. I did revert to my older Win 7 laptop for a while until I gave up and uninstalled update 1809.