Microsoft is focused on increasing the number of PCs that run on Windows 10, and sometimes goes the extra mile.
In you use Windows 7 on a computer that is able to support Windows 10, it is likely that Microsoft already bombarded you with ads that urge you to upgrade your OS. The company went as far as automatically updating the Windows 7 and Windows 8 for some users, which caused a predictable uproar. Later, Microsoft claimed that it was a system fluke and released an update to take care of the issue.
Reports show that users of Microsoft product keep complaining over Twitter that the company persists in sending upgrade notices that take over the display, while showing no apparent way to remove them.