Don't-Miss Operating System Stories

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Windows 10 tips: Your first 30 minutes with the Tech Preview

So you've downloaded Microsoft's Windows 10 Technical Preview. Let PCWorld show you around your new OS with our newbie's guide to Windows 10, complete with tips and tricks.

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Windows 10 Technical Preview: The consumer goodies we expect to see next

The current preview is all about making businesses happy, but Microsoft hasn’t forgotten about the user on the street. Look for news about Cortana, Internet Explorer and more, probably at the Consumer Electronics Show.

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Trying Windows 10 Tech Preview? Keep these 7 things in mind

The software you'll install on your PC is an early stage version of the OS that'll have bugs and will change a lot over time

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ARM builds an OS for the Internet of Things

ARM's mbed OS will be free for use on ARM chips when it's released next year.

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Windows 10: 12 things you need to know

Microsoft's OS is due next year and will run on all devices

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Hands-on with Microsoft's new Windows 10: UI changes that look great at first blush

At this point, Microsoft's next OS is literally a work in progress. But some of the changes in UI are available to view, and they're both lovely and productive.

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Windows 10 revealed: Microsoft's next OS fuses Windows 7 and 8

Microsoft executives said Windows 10 is Microsoft's response to feedback to consumers and businesses who still weren't satisfied with Windows 8. And you'll get to try it out for yourself.

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With Windows 9, Microsoft will try to put Windows 8 era behind it

The company is expected to unveil a preview of the Windows 8 successor on Tuesday. Will it fix Windows 8?

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Ubuntu Touch finalized, first phones coming this year

The audacious Ubuntu Edge smartphone may have fizzled out, but Ubuntu Touch lives on--and it just hit 'release to manufacturing' status.

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'Bigger than Heartbleed' Shellshock flaw leaves OS X, Linux, more open to attack

The good news: Patches are already rolling out. The bad news: This devastating vulnerability could be around for a long, long time.

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The kill switch is here: iOS 8 enables it by default

Apple is the first smartphone maker to abide by a new California anti-theft law by inserting a "kill switch" into iOS 8, which powers the iPhone 6.

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Leaked Windows 9 video shows new virtual desktops feature in action

Rejoice, PC power users: It looks like virtual desktops may finally be coming to Windows 9.

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Windows 9 leak: How the new Start menu could backfire

The leaked screenshots show a Windows-7-like Start menu next to a mini-bar of Windows 8.1 Tiles, an awkward compromise that might not satisfy anyone.