It is a proprietary tool antivirus tool developed and deployed by Microsoft on Windows 8.1 and Windows 10 by default. At the time of its inception, it was not a perfect tool, but it has been improved leaps and bounce since then. After a few updates in 2019, it is considered as one of the best antivirus tools in the free market segment.
And in its current state, it features all functionalities a good antivirus software needs. It is rated highly by all antivirus testing labs, but Avast free still ranks higher. It detects and removes the cyber threats almost 100% without increasing a load on your system.
Read More: Windows Defender Windows 10 Reviews