Windows 11's release date is today, but not everyone will get Microsoft's new OS at once - CNET

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Windows 11 update on a laptop Microsoft says Windows 11 will start rolling out on Oct. 5.  Sarah Tew/CNET

Windows 11[1] begins its worldwide release today. We've already tested and published a full review of Windows 11[2] (it's familiar, but fresh). Microsoft's first major operating system update in six years is available as a free download for existing Windows users[3] starting today, but the OS won't roll out to every compatible Windows device[4] at once and it won't have every major new feature[5] promised just yet, Microsoft said in an August blog post[6]

Now playing: Watch this: Windows 11: Will your computer be able to run it? What...

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While the first general release of Windows 11 will include features like a more streamlined, Mac-like design[7], an updated Start menu[8], new multitasking tools[9] and integrated Microsoft Teams[10], it will not include one of the most anticipated updates: support for Android mobile apps[11] in its new app store. Microsoft also didn't offer a date for when Android apps would be available[12] either, other than saying that they would roll out in a "preview" test "over the coming months," according to the post.

And just because you have a compatible Windows device doesn't mean you'll be able to run Windows 11 starting today. The launch will be "phased and measured," with new eligible devices[13] getting the upgrade first and the rest getting offered the free upgrade sometime between October and mid-2022, depending on your hardware, age of device and other factors. You'll get a notification from Windows Update letting you know when Windows 11 is available to you, or you can check manually (here's more on how to download Windows 11[14] when the time comes and how to try the preview version). 

Now playing: Watch this: Windows 11: Hands-on with an early build

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While you wait for Microsoft's new operating system to arrive, you can check to see if your computer will be able to automatically update to Windows 11[15] (you'll need to be running Windows 10 first to do so -- here's how to download Windows 10 for free[16] if you haven't yet). But even if it isn't deemed compatible, there will be a way to manually download a version[17] that is not supported by Microsoft. And here's how to set the default search engine[18], if you'd rather not use Bing.

You also don't have to upgrade to Windows 11 right away if you don't want to -- Microsoft will still support Windows 10[19] through October 2025. 

For more, check out the every big difference between Windows 10 and Windows 11[20] and what you'll need to do before you upgrade to Windows 11[21]