Microsoft pitches Windows 10 upgrade to holdouts with full-screen intrusion

Microsoft has deployed another Windows 10 upgrade weapon from an arsenal once thought empty.
Last week, Microsoft began serving some Windows 7 and Windows 8.1 users with a full-screen notice that reminded them of the July 29 end to the free Windows 10 upgrade offer and urged them to accept the deal.
The full-screen notification appeared when users unlocked the OS at the log-in screen. "Sorry to interrupt, but this is important," the notice stated. "Windows 10 free upgrade offer ends July 29." T