Vulnerabilities are security flaws in IT applications that could make your computer easy prey to different types of malicious software and hackers.
To check if there are vulnerabilities on your computer:
Click on Scan.
Click on Detect vulnerabilities.
A vulnerabilities view appears which shows all of the vulnerabilities detected. Click on Windows Update to fix the vulnerabilities.
Click on More information to get more data about the vulnerability you want and about the threats that can exploit it.