That is actually a notification/advertisement coming through Google Chrome. Click on Start - Settings - System - Notifications & Actions. Scroll down to find Google Chrome and turn off notifications.

Then you should also scan with ADW Cleaner.
https://www.malwarebytes.com/adwcleaner

And then check for any junk extensions in Chrome.
- In Chrome click on the 3 dots in the upper right corner.
- In the menu that pops up click Settings near the bottom.
- In the column on the left click Extensions.
- You can leave the Chrome Apps, anything else that you don't recognize is suspect and probably should be removed.