Windows Defender asks for Scan while other Anti-Malware is installed
Are you using compatible type of Avira with Windows 10?
May be during the installation, it didn’t corner off Windows Defender.
Open commence and search for Security and Maintenance and under Security, check for Anti-Germ and see whether Windows Defender is off or is it possible to corner it off from there?
Try restart your PC.
Also, try uninstall Avira and download and install the latest type.