Since you uninstalled the antivirus, maybe there are some leftover files from it?
Drivers, services, or something else?
It’s always a good idea to use a tool like Revo Uninstaller to completely remove the program, as it will clean up any leftover files (folders, registry entries, etc.).
Try this now:
Check Windows Settings/Apps/Installed apps to see if any AV components remain.
Check Task Manager/Startup and the Processes tab to see if there are any processes related to AV.
Check Windows Security/Virus & threat protection/Security providers to see if Avast/AVG is still listed as an antivirus provider.
If anything remains after a standard uninstallation, use the official AV tool (if available) to completely remove it.
Important: LiveGuard may not only check whether AV is currently running. The anti-cheat system may react to the presence of specific drivers, services, or remnants of security software.
It's always worth a try.