Failed to extract required files from an archive. Please try again.
If your antivirus software detects a virus in a Blizzard game folder, the detection will most likely be a false positive.
Failed to download files from Blizzard servers.
Failed to download files from Battle.net -- "We're having some trouble transferring data. Please wait while we keep trying."
How to resolve this issue when installing or updating a game
What to do when getting an error that the Battle.net Account has logged in somewhere else.
Types of issues Blizzard Customer Support can help you with on Activision games