>>1536744>windows 7Most games are compiled with language libraries for window 10 onwards, so even if you run in compatibility mode, it may eventually handshake to the server that then denies you. For example, Ragnarok Online game developers compiled to be compatible with as old an operating system as possible, so their game still works for Win7. However, the online game protection security software by a THIRD PARTY company was compiled for win10 or newer, so attempts to play the game fail because the anti-cheat watchdog that monitors the game gets triggered.