Here is a comparison between Windows Defender for Windows Security Quick, Full, Custom, and Offline Scans - and when you should run them.

Windows Defender is built into Windows 10 to find malware. To improve performance for tasks like compiling code or running ...

Windows Defender on the other hand offers antivirus and anti-malware protection, a built-in firewall, etc. It does not come with all the advanced features AVG has.