Is Avast necessary for Windows 10?

Related questions

1. Does Avast replace Windows Defender?
2. Can Windows Defender work with Avast?
3. Is Avast free really free?
4. Does Avast automatically renew?
5. Does Avast work on Windows 10?
6. Is AVG better than Windows Defender?
7. Is Avast free forever?
8. Is AVG Free better than Avast Free?
9. How good is Avast Free?
10. Is Avast better than Windows Defender?

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