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Why Does Virgil Turn Hostile? [Solved]

He will turn hostile (together with his Protectron and turrets) when returning to him (when returning him the serum, or once he is cured) if the cave is entered in power armor. This is caused by the “Targeting HUD” helmet upgrade (others upgrades may or may not affect this).

Fallout 4:How to fix Virgil attacking glitch

hope you enjoy the video and hope it helps you out .

Fallout 4 - VIRGIL All Endings GOOD vs BAD Options

Fallout 4 Gameplay Walkthrough -

Fallout 4 - Strong’s Reaction to Curing Virgil

Wow… Strong really hates it if you cure