That third possibility could prop up Windows 7's user share longer than under pre-slump circumstances. Consumers who have a working Windows 7 PC and plan to use that system until it dies, forgoing any replacement, then drop the form factor entirely, won't bother upgrading the OS. They will continue to run Windows 7, even as they power up the PC less and less often.
Microsoft will support Windows 7 until mid-January 2020.
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