A configuration mistake in the Microsoft News app caused Window 10 users to receive strange test notifications, which caused them to think they were infected. Last Friday, users on Reddit began posting about strange notifications they were receiving in the Windows 10 action center. These notifications indicated they were from the Microsoft News app, but were labeled as coming from Microsoft Movies.
Even stranger, these notifications contained messages stating “Test Notification, “thsi test notification”, and “this is test notification” as shown below. When users started receiving these errors, especially the ones that were misspelled, they became worried that Windows was infected with a virus. Some went as far as to say that they almost wiped their machines.
Source: BleepingComputer