Microsoft's incessant nagging of Windows users to upgrade to Windows 10 has hit a new high as there is now a fullscreen pop-up that appears asking you to upgrade.

Windows 10 will stop being a free upgrade for Windows users form the end of July, so Microsoft is adamant to get as many machines as it can moving up to the newest version of the operating system.

Looking like the terrifying Blue Screen of Death, the pop-up explains that the free upgrade period is running out on July 29th, and asks users if they want to upgrade there or then or wait and install it later.

There is also an option to never be asked again, finally letting users of Windows 7 or 8 continue as they were.

Notifications to upgrade have driven Windows users crazy lately, with one woman suing Microsoft for $10,000 after she got the update without wanting it.