sfc /scannow Then reboot.
Right-click Watch Dogs 2 → Properties → Installed Files → Verify integrity of game files watch dogs 2 untrusted system file dbghelp.dll
This error typically occurs when or the game’s integrity check flags dbghelp.dll (a Windows debugging helper) as modified, untrusted, or foreign. sfc /scannow Then reboot
If none works, post the (including any codes) – some EAC errors require a support ticket with Ubisoft/EAC. or foreign. If none works