I agree I was having problem trying to use Checkpoint VPN. When I start services it causes my laptop top's screen to go black no cursor. I have to hold power button down till PC Reboots. I have disabled Systemguard by clicking on the basic menu screen Computer and files then click configure. Click on Radio button to turn off (disable) SystemGuard. I was then able to close McAfee and use Checkpoint VPN as normal.
I noticed the problem after auto downloading and installing updates between Saturday Sept 27 and October 1.
I sure hope McAfee fixes this problem quickly. Hope this helps.
Will Techs post something here so we know when they have fix for this error available as an update. I currently have turned updating McAfee off for now, but I do want to get current ASAP.