Windows 10's five-year mainstream support cycle starts on July 29, 2015, after that there will be a second five-year extended support phase during which the OS will get further security updates but no new features.
There will be no hidden charges of extra fees during that period — even if you’re buying Windows 10 later this year or following the one-year free upgrade period.One somewhat big change versus before is that the consumer versions of Windows 10 will download and install updates automatically. The idea behind Windows 10 is that this operating system is never ready, it will be updated continuously and these updates will be pushed to consumers as soon as they're ready. On a related note, Microsoft just released a new Windows 10 card that plays the familiarity card in order to urge users to upgrade.
Microsoft will push updates even if the company who made your laptop, tablet or computer stops delivering firmware updates for the device, the company revealed.
Sure, some features might not be available in the future on older devices. Moreover, in two to three years it’s likely that some Windows 10 features won’t be compatible with existing hardware. But Microsoft will still offer users security updates and patches along the way.