A Windows message says that the PC doesn’t have any antivirus software, even though Avast is running. Why is that?

If the Windows Action Centre does not detect Avast on your computer, you can resolve the issue by repairing Avast. To do this, go to the Windows Control Panel > Programmes > Uninstall a programme > Select Avast and click on Edit. Then, in the Avast window that opens, click on Repair.