A configuration error in the Windows 10 News app caused Windows 10 users to receive strange test notifications. These notifications indicated they were from the Microsoft News app, but were labeled as coming from Microsoft Movies. Microsoft confirmed that this was the reason in a statement to BleepingComputer. The issue was resolved on March 29th via a configuration update for existing versions of the app that addresses the issue. The notification does not affect the application or use, and this issue should now be resolved, a Microsoft spokesperson said.
Source: https://www.bleepingcomputer.com/news/microsoft/windows-10-news-app-blunder-made-users-think-theyre-infected/