Hi, I am an Independent Advisor.
Let me help you with this issue.
I understand you are seeing a pop-up on your screen about Trojan virus showing you that it is from Microsoft.
That is a fake alert, a technical support scam.
Please close that window by tapping on ALT F4, or CTRL ALT DEL and open Task manager, end task on all browsers that are open.
Scan your machine using Windows Security.