Use these steps to repair file permission settings for the game folder and all enclosed files/folders.

Information on how to restore your Diablo III character

How to launch multiple WoW clients on the same computer

How to report a player who isn't participating in a battleground.

Black Screen when starting StarCraft II.

Troubleshooting steps for Diablo II (2000) performance issues

How to block communication from another player in Diablo III.

Troubleshooting black screen crashes in Heroes of the Storm

The Quick Join feature in World of Warcraft lets you join your friends or guildmates when they enter a queue.

Player reports they had heroes they use to play in Diablo III and they're now missing.