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---
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title: Windows 10 updates, channels, and tools
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description:
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description: Brief summary of the kinds of Windows updates, the channels they are served through, and the tools for managing them
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keywords: updates, servicing, current, deployment, semi-annual channel, feature, quality, rings, insider, tools
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ms.prod: w10
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ms.mktglfcycl: manage
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@ -18,8 +18,7 @@ ms.topic: article
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There are four phases to the Windows update process:
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- **Scan:** A device checks the Microsoft Update server or your Windows Server Update Services (WSUS) endpoint at random intervals to see if
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any updates have been added since the last time updates were searched, and then evaluates whether the update is appropriate by checking the policies that have been set up by the
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- **Scan:** A device checks the Microsoft Update server or your Windows Server Update Services (WSUS) endpoint at random intervals to see if any updates have been added since the last time updates were searched, and then evaluates whether the update is appropriate by checking the policies that have been set up by the
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administrator. This process is invisible to the user.
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- **Download:** Once the device determines that an update is available, it begins downloading the update. The download process is also invisible to the user. With feature updates, download happens in multiple
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sequential phases.
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@ -32,11 +31,11 @@ version of the software.
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We include information here about a number of different update types you'll hear about, but the two overarching types which you have the most direct control over are *feature updates* and *quality updates*.
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- **Feature updates:** Released twice per year, around March and September. Feature updates add new features and functionality to Windows 10. Because they are delivered frequently (rather than every 3-5 years), they are easier to manage.
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- **Security updates:** Updates that fix security issues that have been discovered are typically included in monthly *quality updates*, but of course can be released out of band whenever necessary for severe issues (referred to as *critical updates*).
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- **Quality updates:** Quality updates deliver both security and non-security fixes to Windows 10. They are typically released on the second Tuesday of each month, though they can be released at any time. Quality updates include security updates, critical updates, servicing stack updates, and driver updates. Quality updates are *cumulative*, so installing the latest quality update is sufficient to get all the available fixes for a specific Windows 10 feature update, including any out-of-band security fixes and any *servicing stack updates* that might have been released previously.
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- **Quality updates:** Quality updates deliver both security and non-security fixes to Windows 10. Quality updates include security updates, critical updates, servicing stack updates, and driver updates. They are typically released on the second Tuesday of each month, though they can be released at any time. The second-Tuesday releases are the ones that focus on security updates. Quality updates are *cumulative*, so installing the latest quality update is sufficient to get all the available fixes for a specific Windows 10 feature update, including any out-of-band security fixes and any *servicing stack updates* that might have been released previously.
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- **Servicing stack updates:** The "servicing stack" is the code component that actually installs Windows updates. From time to time, the servicing stack itself needs to be updated in order to function smoothly. If you don't install the latest servicing stack update, there's a risk that your device can't be updated with the latest Microsoft security fixes. Servicing stack updates are not necessarily included in *every* monthly quality update, and occasionally are released out of band to address a late-breaking issue. Always install the latest available quality update to catch any servicing stack updates that might have been released. The servicing stack also contains the "component-based servicing stack" (CBS), which is a key underlying component for several elements of Windows deployment, such as DISM, SFC, changing Windows features or roles, and repairing components. The CBS is a small component that typically does not have updates released every month. You can find a list of servicing stack updates at [Latest servicing stack updates](https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/ADV990001). For more detail about servicing stack updates, see [Servicing stack updates](servicing-stack-updates.md).
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- **Driver updates**: These are updates to non-Microsoft drivers applicable to your devices. You can turn off driver updates by using Windows Update for Business policies, if desired. {WHAT ABOUT MS DRIVERS?}
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- **Microsoft product updates:** These are updates for other Microsoft products, such as Office. You can enable or disable Microsoft updates by using Windows Update for Business policies.
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- **Driver updates**: These are updates to drivers applicable to your devices. Driver updates are turned off by default in Windows Server Update Services (WSUS), but for cloud-based update methods, you can control whether they are installed or not.
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- **Microsoft product updates:** These are updates for other Microsoft products, such as Office. You can enable or disable Microsoft updates by using policies controlled by various servicing tools.
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## Servicing channels
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The first step of controlling when and how devices install updates is assigning them to the appropriate servicing channel. You can assign devices to a particular channel with any of several tools, including Microsoft Endpoint Configuration Manager, Windows Server Update Services (WSUS), and Group Policy settings applied by any of several means. By dividing devices into different populations ("deployment groups" or "rings") you can use servicing channel assignment, followed by other management features such as update deferral policies, to create a phased deployment of any update that allows you to start with a limited pilot deployment for testing before moving to a broad deployment throughout your organization.
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### Semi-Annual Channel
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In the Semi-Annual Channel, feature updates are available as soon as Microsoft releases them, twice per year. As long as a device isn't set to defer feature updates, any device using the Semi-Annual Channel will install a feature update as soon as it's released. If you use Windows Update for Business, the Semi-Annual Channel provides three months of additional total deployment time before being required to update to the next release.{IS THIS STILL TRUE?}
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### Semi-annual Channel
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In the Semi-annual Channel, feature updates are available as soon as Microsoft releases them, twice per year. As long as a device isn't set to defer feature updates, any device using the Semi-annual Channel will install a feature update as soon as it's released. If you use Windows Update for Business, the Semi-annual Channel provides three months of additional total deployment time before being required to update to the next release.{IS THIS STILL TRUE?}
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> [!NOTE]
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> All releases of Windows 10 have **18 months of servicing for all editions**--these updates provide security and feature updates for the release. However, fall releases of the **Enterprise and Education editions** will have an **additional 12 months of servicing for specific Windows 10 releases, for a total of 30 months from initial release**. This extended servicing window applies to Enterprise and Education editions starting with Windows 10, version 1607.
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### Windows Insider program
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### Windows Insider Program for Business
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Insider preview releases are made available during the development of the features that will be shipped in the next feature update, enabling organizations to validate new features as well as compatibility with existing apps and infrastructure, providing feedback to Microsoft on any issues encountered. There are actually three options within the Windows Insider Program for Business channel:
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- Windows Insider Fast
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- Windows Insider Slow
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- Windows Insider Release Preview
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We recommend that you use the Windows Insider Release Preview channel for validation activities.
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Insider preview releases are made available during the development of the features that will be shipped in the next feature update, enabling organizations to validate new features as well as compatibility with existing apps and infrastructure, providing feedback to Microsoft on any issues encountered.
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### Long-term Servicing Channel
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The Semi-Annual Channel is the default servicing channel for all Windows 10 devices except those with the LTSB edition installed. The following table shows the servicing channels available to each Windows 10 edition.
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| Windows 10 edition | Semi-Annual Channel | Long-Term Servicing Channel | Insider Program |
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| Windows 10 edition | Semi-Annual Channel | Insider Program | Long-Term Servicing Channel |
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| --- | --- | --- | --- |
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| Home |  |  |  |
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| Pro |  |  |  |
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| Enterprise |  |  |  |
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| Enterprise LTSB |  |  |  |
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| Pro Education |  |  |  |
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| Education |  |  |  |
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| Home | | | |
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| Pro |  |  | |
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| Enterprise |  | | |
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| Enterprise LTSB |  | | |
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| Pro Education |  |  | |
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| Education |  |  | |
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## Servicing tools
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### Tools for on-premises update delivery
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Windows Server Update Services (WSUS): you set up a WSUS server, which downloads updates in bulk from Microsoft. Your individual devices then connect to your server to install their updates from there.
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You can set up, control, and manage the server and update process with a number of tools:
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- A standalone Windows Server Update Services server operated directly
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- Configuration Manager
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- Non-Microsoft tools
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For more information, see [Windows Server Update Services (WSUS)](https://docs.microsoft.com/windows-server/administration/windows-server-update-services/get-started/windows-server-update-services-wsus).
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### Tools for cloud-based update delivery
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Your individual devices connect to Microsoft endpoints directly to get the updates. The details of this process (how often devices download updates of various kinds, from which channels, deferrals, and details of the users' experience of installation) are set on devices either with Group Policy or MDM policies, which you can control with any of a number of tools:
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- [Group Policy Management Console](waas-wufb-group-policy.md) (Gpmc.msc)
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- [Microsoft Intune](waas-wufb-intune.md)
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- [Configuration Manager](deploy-updates-configmgr.md)
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- Non-Microsoft MDM tools
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### Hybrid scenarios
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It is also possible to combine WSUS-based on-premises update distribution with cloud-based update delivery.
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## Servicing tools
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