Updates for Windows 10, version 20H2 and Windows Server, version 20H2
Windows 10 is a service, which means it gets better through periodic software updates.
For more information about the update and how to get it, see:
- How to get the Windows 10 October 2020 Update.
- What’s new for IT pros in Windows 10, version 20H2.
- Windows 10 release information.
- Windows lifecycle fact sheet.
What's new for Windows 10, version 20H2 and Windows 10, version 2004 release notes
Windows 10, versions 20H2 and 2004 share a common core operating system and an identical set of system files. As a result, the release notes for Windows 10, version 20H2 and Windows 10, version 2004 will share an update history page. Each release page will contain a list of addressed issues for both 20H2 and 2004 versions. Note that the 20H2 version will always contain the fixes for 2004; however, 2004 will not contain the fixes for 20H2. The update history page will provide you with the build numbers for both 20H2 and 2004 versions so that it will be easier for support to assist you if you encounter issues.
Current status of Windows 10, version 20H2 and Windows Server, version 20H2
|Certain Japanese half-width Katakana and full-width Katakana characters that have a consonant mark aren’t interpreted as the same character. When you use the CompareStringEx() function with the NORM_IGNOREWIDTH flag to compare them, these characters are evaluated as different because of an issue in the sorting rule. This issue affects all the updates starting on October 29, 2020 for Windows 10, version 20H2.|| |
Important If you have not installed KB4586853 or later on the computer, setting an invalid value in this registry might prevent the computer from starting up.
This workaround reverts the National Language Support (NLS) sorting rule to version 6.2, which is used in Windows 10, version 1909 and earlier. When sharing data between systems, consider applying the workaround consistently. If you use this workaround, conduct sufficient testing and evaluations to mitigate problems caused by different sorting rule versions on multiple systems.
Notes and messages
IMPORTANT Starting in July 2020, we will resume non-security releases for Windows 10 and Windows Server, version 1809 and later. There is no change to the cumulative monthly security updates (also referred to as the "B" release or Update Tuesday release). For more information, see the blog post Resuming optional Windows 10 and Windows Server non-security monthly updates.
IMPORTANT Starting in July 2020, all Windows Updates will disable the RemoteFX vGPU feature because of a security vulnerability. For more information about the vulnerability, see CVE-2020-1036 and KB4570006. After you install this update, attempts to start virtual machines (VM) that have RemoteFX vGPU enabled will fail, and messages such as the following will appear:
- “The virtual machine cannot be started because all the RemoteFX-capable GPUs are disabled in Hyper-V Manager.”
- “The virtual machine cannot be started because the server has insufficient GPU resources.”
If you re-enable RemoteFX vGPU, a message similar to the following will appear:
- "We no longer support the RemoteFX 3D video adapter. If you are still using this adapter, you may become vulnerable to security risk. Learn more (https://go.microsoft.com/fwlink/?linkid=2131976)”
If you have questions or need help activating or troubleshooting Windows, see our help topics below:
- For information about how to update, see Update Windows 10.
- If you have questions about manually installing or removing an update, see Windows Update: FAQ.
- Getting an error message when updating? See Troubleshoot problems updating Windows 10.
- If you need to activate Windows, see Activation in Windows 10. If you’re having trouble with activation, see Get help with Windows activation errors.
- To get the latest major update to Windows 10, see Get the Windows 10 October 2020 Update.