Redstone 5: Windows 10 Update Explained

Redstone 5 is the development codename for the Windows 10 October 2018 Update (version 1809). It was a major feature update that introduced several user-facing improvements, most notably the dark theme for File Explorer, the new clipboard history with cloud sync, and the Your Phone app. For Windows 10 users, Redstone 5 matters because it was one of the last updates to add significant new features before Microsoft shifted to a more incremental release cadence, and many of its features remain in use today.

Background: The Redstone Era

Microsoft used the codename “Redstone” for a series of Windows 10 feature updates starting in 2016. The name comes from the video game Minecraft, where redstone is a mineral used to create circuits and mechanisms. Microsoft acquired Mojang, the company behind Minecraft, in 2014, and the codename was a nod to that acquisition. The Redstone wave included four major updates:

Redstone 1: Windows 10 Anniversary Update (version 1607, August 2016)
Redstone 2: Windows 10 Creators Update (version 1703, April 2017)
Redstone 3: Windows 10 Fall Creators Update (version 1709, October 2017)
Redstone 4: Windows 10 April 2018 Update (version 1803, April 2018)
Redstone 5: Windows 10 October 2018 Update (version 1809, October 2018)

After Redstone 5, Microsoft moved to a new codename scheme (e.g., 19H1, 20H1) and eventually to a single annual feature update starting in 2021. Redstone 5 was therefore the last of its line, making it a significant milestone in Windows 10’s evolution.

Key Features Introduced in Redstone 5

The October 2018 Update packed a surprising number of features for a single release. Some of the most impactful ones include:

Dark Theme for File Explorer: The dark mode, previously limited to apps, was extended to the File Explorer and the context menu, giving the OS a more cohesive look.
Clipboard History and Cloud Sync: Pressing Win+V now opened a clipboard history panel, and you could sync your clipboard across devices using your Microsoft account.
Your Phone App: This new app allowed you to link your Android or iOS phone to your PC, enabling you to see photos and notifications and later even mirror your phone screen.
Snap Groups: When you snap two or more windows together, they are saved as a group, and you can restore the entire group from the taskbar in one click.
Screen Sketch Improvements: The snipping tool was upgraded to a new “Snip & Sketch” app with a delay timer and a more modern interface.
Windows Security Updates: The Windows Defender Security Center was renamed to Windows Security, with a new icon and more detailed protection history.
Storage Sense: This feature became more proactive, automatically cleaning temporary files and recycle bin contents based on your schedule.

These features were not just cosmetic; they changed how many users interacted with the OS daily, particularly the clipboard history and Your Phone app, which remain core parts of Windows 10 and Windows 11 today.

How Redstone 5 Was Delivered

Like all feature updates, Redstone 5 was distributed through Windows Update. Microsoft used a phased rollout, meaning the update was offered to a small group of users first, then gradually expanded to more devices as telemetry confirmed stability. Users could also manually trigger the update via Settings > Update & Security > Windows Update, or use the Media Creation Tool to perform a clean install.

One notable aspect of Redstone 5’s delivery was the infamous file-deletion bug. Shortly after the initial rollout, Microsoft paused the update after reports that some users’ files were being deleted from their user profile folders. The company later re-released the update after fixing the issue, but the incident highlighted the risks of automatic feature updates and led Microsoft to introduce a “pause updates” option for consumers.

Common Problems and How to Handle Them

Beyond the file-deletion bug, Redstone 5 had a few other known issues that users encountered:

Compatibility issues with older drivers: Some users experienced blue screens or audio problems until they updated their drivers.
Task Manager showing incorrect CPU usage: A bug caused the Task Manager to report 0% CPU usage for some processes, which was fixed in a later cumulative update.
Dark theme not applying to all elements: Some parts of the File Explorer remained light, which was a cosmetic annoyance.

If you are still on an older version and want to upgrade, the safest approach is to back up your files first, then use the Windows Update assistant or the Media Creation Tool. If you are already on a later version, you don’t need to install Redstone 5 specifically; the features are included in all subsequent updates.

Comparison with Later Updates

Redstone 5 was the last “big” feature update. Subsequent updates (19H1, 19H2, etc.) focused more on polish and small improvements rather than headline features. For example, Windows 10 version 1903 introduced a separate search experience and a lighter theme, but nothing as transformative as the clipboard history or Your Phone app. This makes Redstone 5 a high-water mark for Windows 10’s feature set.

If you are comparing Redstone 5 to the latest Windows 10 version (22H2), you’ll find that 22H2 includes all of Redstone 5’s features plus many more, such as the new Notepad and Media Player apps. However, the core experience is largely the same, which is why many users still refer to the October 2018 Update as the foundation of modern Windows 10.

Safety and Update Considerations

When it comes to feature updates, it’s always wise to be cautious. Microsoft’s own guidance is to wait a few weeks after a feature update is released before installing it, to allow time for early bugs to be discovered and fixed. For Redstone 5, that advice was particularly relevant given the file-deletion issue.

If you are still on Redstone 5 today (version 1809), you should know that Microsoft ended support for it on May 12, 2020. This means no more security patches, leaving your system vulnerable. You should upgrade to a supported version, such as Windows 10 22H2, or to Windows 11 if your hardware meets the requirements. Upgrading is free and can be done through Windows Update or the Media Creation Tool.

Frequently Asked Questions

Is Redstone 5 the same as Windows 10 version 1809?

Yes, Redstone 5 is the codename, and version 1809 is the official version number. The version number indicates the year and month of release (October 2018).

Can I still download Redstone 5?

Microsoft no longer offers the October 2018 Update for download because it is out of support. You can only get the latest version of Windows 10, which includes all the features of Redstone 5.

Did Redstone 5 delete files?

Yes, a bug in the initial release caused some users’ files to be deleted when they updated. Microsoft paused the rollout and fixed the issue before re-releasing it. If you update now, you won’t encounter that bug.

What is the difference between Redstone 5 and Redstone 4?

Redstone 4 (version 1803) was the April 2018 Update. Redstone 5 added the dark File Explorer, clipboard history, Your Phone app, and Snap Groups, among other improvements.

Do I need Redstone 5 to use Windows 10?

No, Redstone 5 is just one version of Windows 10. The latest version (22H2) is recommended because it has more features and security updates. If you are on an older version, you should upgrade.

General steps for current mainstream versions; menus can differ by device and version. See the disclaimer or report an error.

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