Microsoft is to extend support for Windows 7 - at a price - when the operating system reaches end of life (EOL) on 14 January 2020.
While that's in fewer than 500 days, Windows 7 still accounts for around 40 per cent of the world's desktop and laptop computers, many of them humming away in corporate and public-sector environments around the world.
For the first time, though, Microsoft has explicitly promised that it will carry on supporting Windows 7, but only for users willing to pay.
It followed the same policy with Windows XP, but those deals tended to be done behind closed doors, and organisations had more pressing security reasons for migrating from Windows XP, rather than dragging their feet.
Prices will vary depending on volume (charges are per machine), and will increase over time. So, by January 2023, when even this new form of extended-extended support end, organisations running Windows 7 could be paying a small fortune.
In a recent survey, it was found that well over half of companies had no plans to move to Windows 10.
Microsoft has not suggested that it has any plans to make businesses contractually obliged to show that they are working towards migration, as they did with Windows XP. By 2022, though, it may be that the fees are so high that it's actually worth more to Microsoft not to force upgrades.
It is understood that the UK government paid £5.5m in public money for a year of extended support for Windows XP, which didn't include vital services like the NHS - indicating how profitable extended-extended support could be for the software giant.
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