Microsoft apologizes after a rogue Windows 10 preview build causes chaos

It even appeared on Windows phones that aren't part of the preview program.

This is why you only put Windows 10 Insider preview builds on secondary PCs, folks.

On Thursday, Microsoft accidentally pushed Windows 10 builds from internal development branches to a small number of Windows Insider machines due to “an inadvertent deployment to the engineering system that controls which builds/which rings to push out to Insiders,” overseer Dona Sakar says. These early builds were never intended for release on consumer systems and could affect stability—definitely so, in the case of the build that slipped onto some Windows phones.

Windows Insider PCs got off easy. Although Sakar warns that the accidental build “may include issues that impact usability of your PC—more so than the normal builds we give you,” the installation doesn’t seem overly dangerous. Sakar says impacted users can even sit tight and wait for Microsoft to send them a new build. If you run into unexpected issues in the meantime, you can roll back to a previous Windows 10 build via Settings > Update & security > Recovery.

Windows 10 Mobile users are potentially in for bigger headaches.

windows phone update Microsoft

Don’t do it!

“This build will *not* install on your device,” Sakar says. “If you installed this build, your device will be stuck in a reboot loop and the only way to recover is to use the Windows Device Recovery Tool and re-flash. After re-flashing, you can join the Windows Insider Program again on your device and choose your ring and be back on the right update path.”

Surprisingly, the bad build also extended to some Windows phones that aren’t registered in the Insider program, though it won’t install unless you register as an Insider. If you are an Insider and you see a “Install” or “Restart now” update prompt, don’t do it. Instead, immediately back up your phone via Settings > Update & security > Backup, then fully reset your device at Settings > System > About.

Microsoft won’t be releasing any additional Windows 10 Insider builds this week while it fixes the fallout from the rogue release. If you see a new build ready for your device over the weekend, avoid it.

The story behind the story: Windows 10 Insiders should expect occasional road bumps. Delving deep into beta software gets you an early taste of the Windows 10 Fall Creators Update’s new features, but it also opens you up to bugs, bugs, and more bugs. Again: Only join the Windows 10 Insider program on non-critical secondary PCs.

Join the newsletter!

Or

Sign up to gain exclusive access to email subscriptions, event invitations, competitions, giveaways, and much more.

Membership is free, and your security and privacy remain protected. View our privacy policy before signing up.

Error: Please check your email address.

Tags Windows 10Windows 10 Mobile

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.
Brad Chacos

Brad Chacos

PC World (US online)
Show Comments

Brand Post

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Luke Hill

MSI GT75 TITAN

I need power and lots of it. As a Front End Web developer anything less just won’t cut it which is why the MSI GT75 is an outstanding laptop for me. It’s a sleek and futuristic looking, high quality, beast that has a touch of sci-fi flare about it.

Emily Tyson

MSI GE63 Raider

If you’re looking to invest in your next work horse laptop for work or home use, you can’t go wrong with the MSI GE63.

Laura Johnston

MSI GS65 Stealth Thin

If you can afford the price tag, it is well worth the money. It out performs any other laptop I have tried for gaming, and the transportable design and incredible display also make it ideal for work.

Andrew Teoh

Brother MFC-L9570CDW Multifunction Printer

Touch screen visibility and operation was great and easy to navigate. Each menu and sub-menu was in an understandable order and category

Louise Coady

Brother MFC-L9570CDW Multifunction Printer

The printer was convenient, produced clear and vibrant images and was very easy to use

Edwina Hargreaves

WD My Cloud Home

I would recommend this device for families and small businesses who want one safe place to store all their important digital content and a way to easily share it with friends, family, business partners, or customers.

Featured Content

Product Launch Showcase

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?