Windows 10, version 20H2 and Windows Server, version 20H2

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Current status as of October 20, 2020
Windows 10, version 20H2 is available for users with devices running Windows 10, versions 1903 and higher who manually seek to “Check for updates” via Windows Update. The recommended servicing status is Semi-Annual Channel.
 
Note We are slowly throttling up availability over the coming weeks to ensure a reliable download experience. As a result, the update may not be offered to you right away. For more details, see How to get the Windows 10 October 2020 Update.
Windows 10, version 20H2 is now available Windows 10, version 20H2 is now available
Find out how to get the update >
What’s new for IT pros What’s new for IT pros
Explore the latest features and servicing innovations in Windows 10, version 20H2 >

Known issues

This table offers a summary of current active issues and those issues that have been resolved in the last 30 days.

SummaryOriginating updateStatusLast updated
You might receive an error when accessing the sign-in options or users MMC snap-in
You might receive the error, "Your PC will automatically restart in one minute"
N/A

Resolved
2021-01-08
13:57 PT
Stop error when plugging in a Thunderbolt NVMe SSD
Devices using Thunderbolt SSDs may receive a stop error "DRIVER_VERIFIER_DMA_VIOLATION (e6)" when plugging an SSD in.
N/A

Resolved
KB4586853
2020-11-30
14:00 PT
Errors or issues during or after updating devices with certain Conexant audio drivers
Devices with affected Conexant or Synaptics audio drivers might receive a stop error with a blue screen.
N/A

Confirmed
2021-01-05
17:37 PT
Errors or issues during or after updating devices with Conexant ISST audio drivers
Devices with affected Conexant ISST audio drivers might receive an error or have issues with Windows 10, version 2004.
N/A

Confirmed
2021-01-05
17:37 PT
Automatic input of Furigana might not work as expected
In certain circumstances, the automatic Furigana input/conversion feature may not work as expected in apps.
N/A

Mitigated
2020-12-10
18:24 PT

Issue details

December 2020

Automatic input of Furigana might not work as expected

StatusOriginating updateHistory
MitigatedN/A

Last updated: 2020-12-10, 06:24 PT
Opened: 2020-12-03, 12:29 PT
When using the Microsoft Japanese Input Method Editor (IME) to enter Kanji characters in an app that automatically allow the input of Furigana characters, you might not get the correct Furigana characters and might need to enter them manually. Note for developers: Affected apps are using the ImmGetCompositionString function.

Workaround: To mitigate this issue, please follow the instructions in Revert to a previous version of an IME (Input Method Editor).

Affected platforms:
  • Client: Windows 10, version 20H2; Windows 10, version 2004
  • Server: Windows Server, version 20H2; Windows Server, version 2004
Next steps: We are working on a resolution and will provide an update in an upcoming release.

November 2020

You might receive an error when accessing the sign-in options or users MMC snap-in

StatusOriginating updateHistory
ResolvedN/A

Resolved: 2021-01-08, 01:57 PT
Opened: 2020-11-05, 07:01 PT
After updating to Windows 10, version 20H2, you might receive the error in LSASS.exe with the text "Your PC will automatically restart in one minute" when interacting with any dialog window that lists users, for example accessing the sign-in options settings app page or the users folder in the Local user and groups MMC snap-in. This issue only affects devices in which any of the local built-in accounts have been renamed, such as Administrator or Guest. You might also receive an error in the Application Event log with Event ID 1015 that LSASS.EXE failed with status code C0000374. C0000374 is related to heap corruption.

This issue is caused by duplicate built-in user accounts being created with the same security identifiers (SIDs) and relative identifiers (RIDs) during the update to Windows 10, version 20H2. SIDs and RIDs for built-in user accounts are well-known as documented here and must be unique on a given device.

To safeguard your update experience, we have applied a compatibility hold on these devices from installing or being offered Windows 10, version 2004 or Windows 10, version 20H2. If your organization is using Update Compliance, the safeguard ID is 30103339. Note As of January 7, 2021, you should only receive the safeguard hold dialog or safeguard ID if you are using outdated feature update bundles or media.

Workaround: For information on how to mitigate this issue, please see KB4592802. Note If you have already encountered this issue on your device, the uninstall window might be 10 or 30 days depending on the configuration of your environment and the version you’re updating to.

Affected platforms:
  • Client: Windows 10, version 20H2
  • Server: Windows Server, version 20H2
Resolution: As of January 7, 2020, this issue is now resolved and the safeguard hold has been removed when devices are using the latest feature update bundles and refreshed media. Please note, if there are no other safeguards that affect your device, it can take up to 48 hours before you will be able to the update to Windows 10, version 2004 or Windows 10, version 20H2.

Feature update bundles released December 3, 2020 or later will resolve this issue when deploying via Windows Server Update Services (WSUS) and Microsoft Endpoint Configuration Manager. Refreshed media was released December 3, 2020 on Visual Studio Subscriptions (VSS, formerly MSDN Subscriptions) and December 7, 2020 on Volume Licensing Service Center (VLSC). For information on verifying you're using the refreshed media, see How to address feature update refreshes in your environment. If you are using or creating custom media, you will need to include an update released November 17, 2020 or later.

Note Devices using Windows Update for Business or that connect directly to Windows Update should receive the latest Windows Setup from Windows Update without any extra steps. 

Stop error when plugging in a Thunderbolt NVMe SSD

StatusOriginating updateHistory
Resolved
KB4586853
N/A

Resolved: 2020-11-30, 02:00 PT
Opened: 2020-11-05, 07:01 PT
An incompatibility issue has been found with Windows 10, version 2004 or Windows 10, version 20H2 when using an Thunderbolt NVMe Solid State Disk (SSD). On affected devices, when plugging in a Thunderbolt NVMe SSD you might receive a stop error with a blue screen and "DRIVER_VERIFIER_DMA_VIOLATION (e6) An illegal DMA operation was attempted by a driver being verified." Affected Windows 10 devices will have at least one Thunderbolt port and any currently available version of the driver file stornvme.sys.

To safeguard your update experience, we have applied a compatibility hold on Windows 10 devices with affected drivers from being offered Windows 10, version 2004 or Windows 10, version 20H2. If your organization is using Update Compliance, the safeguard IDs is 29991611.

Affected platforms:
  • Client: Windows 10, version 20H2; Windows 10, version 2004
Resolution: This issue was resolved in KB4586853 and the safeguard hold has been removed as of December 11, 2020. Please note, if there are no other safeguards that affect your device, it can take up to 48 hours before the update to Windows 10, version 20H2 or Windows 10, version 2004 is offered.

May 2020

Errors or issues during or after updating devices with certain Conexant audio drivers

StatusOriginating updateHistory
ConfirmedN/A

Last updated: 2021-01-05, 05:37 PT
Opened: 2020-05-27, 12:20 PT
Synaptics and Microsoft have found incompatibility issues with certain versions of drivers for Conexant or Synaptics audio devices and Windows 10, version 2004 (the Windows 10 May 2020 Update). Windows 10 devices with affected Conexant or Synaptics audio drivers might receive a stop error with a blue screen during or after updating to Windows 10, version 2004. The affected driver will be named Conexant HDAudio Driver under Sound, video and game controllers in Device Manager and have versions 8.65.47.53​, 8.65.56.51​, or 8.66.0.0 through 8.66.89.00 for chdrt64.sys or chdrt32.sys.

To safeguard your update experience, we have applied a compatibility hold on Windows 10 devices with affected Conexant or Synaptics audio drivers installed from being offered Windows 10, version 2004 or Windows Server, version 2004 until the driver has been updated. If your organization is using Update Compliance, the safeguard IDs are 25702617, 25702660, 25702662, and 25702673.

Affected platforms:
  • Client: Windows 10, version 20H2, Windows 10, version 2004
  • Server: Windows Server, version 20H2, Windows Server, version 2004
Next steps: Microsoft and Synaptics are working on a resolution for safeguard IDs 25702617 and 25702660, and will provide an update in an upcoming release. Note We recommend that you do not attempt to manually update using the Update now button or the Media Creation Tool until this issue has been resolved.

Resolution: This issue was resolved for safeguard IDs 25702662 and 25702673. The safeguard hold has been removed for these safeguard IDs as of December 11, 2020. Please note, if there are no other safeguards that affect your device, it can take up to 48 hours before the update to Windows 10, version 2004 or Windows 10, version 20H2 is offered. 

Errors or issues during or after updating devices with Conexant ISST audio drivers

StatusOriginating updateHistory
ConfirmedN/A

Last updated: 2021-01-05, 05:37 PT
Opened: 2020-05-27, 12:22 PT
Synaptics and Microsoft have found incompatibility issues with certain versions of drivers for Conexant ISST audio driver and Windows 10, version 2004 (the Windows 10 May 2020 Update). Windows 10 devices with affected Conexant ISST audio driver might receive an error or experience issues while installing the update or after the device has updated. The affected driver will be named Conexant ISST Audio or Conexant HDAudio Driver under Sound, video and game controllers in Device Manager and have file name uci64a96.dll through uci64a231.dll and a file version lower than 7.231.3.0.

To safeguard your update experience, we have applied a compatibility hold on Windows 10 devices with affected Conexant or Synaptics audio drivers installed from being offered Windows 10, version 2004 or Windows Server, version 2004 until the driver has been updated. If your organization is using Update Compliance, the safeguard ID is 25178825.

Affected platforms:
  • Client: Windows 10, version 20H2, Windows 10, version 2004
  • Server: Windows Server, version 20H2, Windows Server, version 2004
Workaround: To mitigate this issue, you will need to check with your device manufacturer (OEM) to see if an updated driver is available and install it.

Next steps: Microsoft and Synaptics are working on a resolution and will provide an update in an upcoming release.

Note We recommend that you do not attempt to manually update using the Update now button or the Media Creation Tool until this issue has been resolved.