Hi, and thank you for your question. My name is ***** ***** I'll be assisting you today.
Your browser seems to have been hijacked by a malicious party that was showing up this fake alert/popup, and has nothing to do with Microsoft at all; so you may simply close out this page now. However, to make sure that your Chrome browser is completely clean now, please do this as well:
Click on the icon with three dots at the top-right of the browser window, and then click Settings.
Scroll down to the very bottom and click "Show advanced settings".
Next, scroll down further to the bottom and click "Reset settings", and reset Chrome when prompted.
This should do it. If you need more help, please use the Reply box below to continue our conversation.
Otherwise, kindly take a moment to rate my service by clicking on (and submit) one of the five stars at the top of this page - this is the only way that I'll be credited for assisting you today. Thank you.