Ms-xbl-multiplayer Link Fix -

[HKEY_CLASSES_ROOT\ms-xbl-multiplayer\shell\open\command] @=""C:\Path\To\YourGame.exe" "%1""

Windows Registry Editor Version 5.00 [HKEY_CLASSES_ROOT\ms-xbl-multiplayer] @="URL:MS-XBL-Multiplayer Protocol" "URL Protocol"="" ms-xbl-multiplayer link fix