If you can't join friends' games or they can't see your lobby, restart your router first. Most connection problems come from stale network sessions. Check your firewall settings next — Windows Defender or third-party antivirus might block the game's network access. Add Civilization VII as an exception in firewall rules. Port forwarding TCP 27015-27030 and UDP 4380 on your router helps if you're hosting.
Late-game turns process hundreds of units. Your CPU does heavy lifting here, not the GPU.
Corrupted autosaves happen when the game crashes mid-turn. Navigate to Documents/My Games/Sid Meier's Civilization VII/Saves. You'll find multiple autosave files with timestamps. Try loading an earlier one. If all autosaves fail, your entire save folder might be damaged. Check if cloud saves are enabled — Steam Cloud or Epic Cloud can restore previous versions.
Switch audio output device in Windows sound settings, then switch back. Sounds weird, but it resets the audio pipeline. Update your audio drivers next. If you're using Bluetooth headphones, switch to wired — Bluetooth codecs sometimes conflict with game audio engines. Check in-game audio settings that master volume isn't muted and all sliders are above 50%.
The game supports controllers but detection is finicky. Plug in your controller before launching. If using Xbox controller wirelessly, connect via USB cable instead — wireless mode has input lag issues. Steam users should disable Steam Input for this game specifically in controller settings. PlayStation controllers need DS4Windows utility running in the background.