It was written by a subsidiary acquired by Microsoft. It is soft kill, small, stable, free, and has excellent compatibility with the operating system (because it is Microsoft's own thing). I have used it for half a month, and now I feel good. I plan to continue to use it, but there is something in it that will send the user's information to Microsoft. Although this will not reveal the personal information of users, pirated users may have problems. After all, the initiative is in the hands of others.
It is recommended to use other killing software, such as antivir and avast, which have official free Chinese, or sell coffee and cards, but there is a charge. And: Dewey (this killing of Troy is first-rate, which may be unknown), but actually 360 is enough. My current combination is 360 security guards+Microsoft official security suite (the one you asked). Also, there may be many problems when Microsoft official security suite installs other killing software.