What version of GOverlay are you using? The message is because RTSS_hook.dll found in the GOverlay folder is missing or inaccesible. 1- Make sure the file exists in the GOverlay folder, if not, reinstall GOverlay or get it manually from the zip file 2- If the file is there, right click and properties and check that the file is not blocked 3- Make sure that if you are using a shortcut to the file, the shortcut path is the GOverlay folder