Hi,
I'm Dyari. Thanks for reaching out. I will be happy to assist you in this regard.
Microsoft Safety Scanner only scans when manually triggered and expires 10 days after being downloaded. To rerun a scan with the latest anti-malware definitions, download and run the Safety Scanner again. It is also recommended that you always download the latest version of this tool before each scan as mentioned in this link:
https://learn.microsoft.com/en-us/microsoft-365...
Regarding removing infections if found, it is best to scan it with the latest version.
You can also, scan for viruses & malware with the free Malwarebytes:
https://www.malwarebytes.com/mwb-download
You can find more steps to disinfect your computer:
https://answers.microsoft.com/en-us/windows/for...
Please do not hesitate to ask if you need further assistance.
Stay safe.
____________________________________________________________
Standard Disclaimer: There are links to non-Microsoft websites. The pages appear to be providing accurate, safe information. Watch out for ads on the sites that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the sites before you decide to download and install it.