Possible Duplicate:
Does Windows 8 require any sort of Virus protection?
I haven't got my head completely around Windows Defender for Windows 8. What is it? I have Avast! but it seems like they are warning for the same things. Are the programs like each other? What are the benefits of each programs?
Lastly, do I need Avast! in Windows 8? Or can I rely on Windows Defender alone?