FreeBooter is absolutely correct, this is a all too familiar scam.
Remember, Microsoft has no way of knowing if your computer has a problem or not. You should also remember that Microsoft will never contact you, if you need their help you must contact them.
Scams like this try to scare you into calling them. When you do they will tell you that your computer is infected and will tell you that they will fix this for a payment of $xxx amount of money. Try restarting the computer and see if the message is still appearing. Another thing to try is to open Programs and Features and see if you see the phone number (877) 753-6941, if you do see it uninstall it.
Please do the following.
Please run Malwarebytes AntiMalware
1) Double-click on mbam-setup.exe, then click on Run to install the application, follow the prompts through the installation.
2) Malwarebytes will automatically open. You will see an image like the one below, click on Update Now.
3) Click on Settings, you will see a image like the one below.
When Settings opens click on Detection and Protection, then under Non-Malware Protection, click on the down arrow for PUP (Potentially Unwanted Programs) detections and select Treat detections as malware. Under Detection Options place a check in the box for Scan for rootkits
4) Click on Scan (next to Settings), then click on Scan Now. The scan will automatically run now.
5) When the scan is complete the results will be displayed. Click on Delete All.
6) Please post the Malwarebytes log.
To find your Malwarebytes log,download mbam-check.exe from here
and save it to your desktop.
To open the log double click on mbam-check.exe on your desktop. Copy and paste the log in your topic.
Please run AdwCleaner
When AdwCleaner opens you will see an image like the one below.
Click on Scan to start the scan.
Once the search is complete a list of the pending items will be displayed. If you see any which you do not want removed, remove the check mark next to it.
If there are no malicious programs are found you will receive the following message.
Click on Clean to remove the selected items. If you have any questions about any items in the list please copy and paste the list in your topic so we can review it.
You will receive a message telling you that all programs will be closed so that the infections can be removed. Click on OK. The computer will be restarted to complete the cleaning process.
When the cleaning process is complete a log of what was removed will be presented. Please copy and the paste this log in your topic.
Check your extensions in the Chrome settings to see if anything has been added.
I will request that this topic be moved to the Am I Infected forum where these tools can be run. These are not meant to be run in the Windows forums.