i am also having this problem sc2 will not start i am getting a fatal error message
97FE2F6A-7606-49D6-8261-07AA13842F24
Howdy!
AVG has a Behavior Shield feature that can cause a hook conflict with the game. Try setting up AVG to fully exclude the Blizzard app and StarCraft II folders from all scans following the steps Here. After that is completed retest!
Thank you!