The good news is that it works automatically
How to Use Windows Malicious Software Removal Tool – 2022 Tutorial
Microsoft maintains an important tool for Windows users called the Malicious Software Removal Tool. If you have been using a Windows system (including Windows 7, Windows 10, and Windows 11) for a while without antivirus software, it is a good idea to use this tool to scan for malware that might have infected your system.
It is more of a spot check tool if you know your system is at risk of malware. Antivirus and antimalware software like Windows Defender that runs automatically will usually block anything that Microsoft Windows Malicious Software Removal Tool finds. So if you have good antivirus protection, you don’t need to worry about running this tool.
Normally, a new version of the Windows Malicious Software Removal Tool is included in a Windows update at least monthly. This means that the tool is updated regularly. Therefore, it is a good idea to download the latest version from Microsoft when you want to use it.