Now that we've identified the possible causes, let's move on to the solutions:
: The most frequent trigger is a brief loss of internet connectivity or your router rebooting.
If you are playing via , corrupted data from a recent patch might be the culprit. Open the Battle.net Desktop App. Select Call of Duty: Vanguard . Click the cogwheel icon next to the Play button. Select Scan and Repair . error 426 call of duty vanguard
Here is a ranking of solutions, from quickest to most technical. Try them in order.
Because Error 426 is an "upgrade required" error, firewalls often misinterpret the secure handshake as a threat. Now that we've identified the possible causes, let's
If network fixes fail, the issue may be within the game installation itself.
Before you start digging into your hardware settings, ensure the problem isn't on Activision's end. Visit the page. Select Call of Duty: Vanguard
Specifically, when you see , the game is telling you: