Telegram Desktop App Not Working on Windows?

Access Telegram With a VPN

If running the app in compatibility mode does not work, try accessing the app through a VPN. Sometimes, certain apps and services are unavailable in specific locations, or a person's IP address is banned by Telegram due to long hours of usage. It is also possible that the app itself is blocked in certain countries. Hence, you should try connecting the app via a VPN to eliminate this possibility. If you're already using a VPN and the app isn't working correctly, try changing your IP and location on the VPN first and, when that doesn't help, consider temporarily disabling it.