Impact: Apps and cameras using WVC1 codec might fail to function as expected. Originating KB URL: https://support.microsoft.com/en-us/topic/5028245 Originating KB Release Date: 2023-07-25T10:00:00-07:00 Originating Build: 22000.30000 Resolved KB URL: https://support.microsoft.com/en-us/topic/5034766 Date Resolved: 2024-02-13T10:00:00-08:00 All Updates: ------------------------------------------------------ February 28, 2024 19:17 PM After installing KB5028245 (https://support.microsoft.com/help/5028245) or later updates, some apps might fail to playback, record, or capture video when using the WVC1 codec (VC-1) (https://learn.microsoft.com/windows-hardware/drivers/display/vc-1). Certain cameras or webcams might also fail to work if they use the WVC1 codec by default. Resolution: This issue was resolved in updates released January 23, 2024 (KB5034766 (https://support.microsoft.com/help/5034766)) and later. We recommend you install the latest security update for your device. It contains important improvements and issue resolutions, including this one. If you install an update released January 23, 2024 (KB5034766 (https://support.microsoft.com/help/5034766)) or later, you do not need to use a Known Issue Rollback (KIR) (https://techcommunity.microsoft.com/t5/windows-it-pro-blog/known-issue-rollback-helping-you-keep-windows-devices-protected/ba-p/2176831) or a special Group Policy to resolve this issue. If you are using an update released before January 23, 2024, and have this issue, you can resolve it by installing and configuring the special Group Policy listed below. The special Group Policy can be found in Computer Configuration > Administrative Templates > <Group Policy name listed below>. For information on deploying and configuring these special Group Policy, please see How to use Group Policy to deploy a Known Issue Rollback (https://docs.microsoft.com/troubleshoot/windows-client/group-policy/use-group-policy-to-deploy-known-issue-rollback). Group Policy downloads with Group Policy name: - Download for Windows 11, version 22H2 (https://download.microsoft.com/download/7/c/c/7cc024d7-3953-4f65-997a-0c916c4a9e5b/Windows%2011%2022H2%20KB5027303%20230528_03453%20Known%20Issue%20Rollback.msi) - Windows 11 22H2 KB5027303 230528_03453 Known Issue Rollback - Download for Windows 11, version 21H2 (https://download.microsoft.com/download/b/0/c/b0c23115-b73b-4b98-99ae-88ae48a7d63a/Windows%2011%20(original%20release)%20KB5028245%20230630_032045%20Known%20Issue%20Rollback.msi) - Windows 11 (original release) KB5028245 230630_032045 Known Issue Rollback Important: You will need to install and configure the Group Policy for your version of Windows to resolve this issue. You will also need to restart your device(s) to apply the group policy setting. Affected platforms: - Client: Windows 11, version 22H2; Windows 11, version 21H2 - Server: None Click here (https://admin.microsoft.com/Adminportal/Home?#/windowsreleasehealth/:/wrhpreferences) to manage email notifications for Windows known issues ------------------------------------------------------ February 20, 2024 22:17 PM After installing KB5028245 (https://support.microsoft.com/help/5028245) or later updates, some apps might fail to playback, record, or capture video when using the WVC1 codec (VC-1) (https://learn.microsoft.com/windows-hardware/drivers/display/vc-1). Certain cameras or webcams might also fail to work if they use the WVC1 codec by default. Resolution: This issue was resolved in updates released January 23, 2024 (KB5034766 (https://support.microsoft.com/help/5034766)) and later. We recommend you install the latest security update for your device. It contains important improvements and issue resolutions, including this one. If you install an update released January 23, 2024 (KB5034766 (https://support.microsoft.com/help/5034766)) or later, you do not need to use a Known Issue Rollback (KIR) (https://techcommunity.microsoft.com/t5/windows-it-pro-blog/known-issue-rollback-helping-you-keep-windows-devices-protected/ba-p/2176831) or a special Group Policy to resolve this issue. If you are using an update released before January 23, 2024, and have this issue, you can resolve it by installing and configuring the special Group Policy listed below. The special Group Policy can be found in Computer Configuration > Administrative Templates > <Group Policy name listed below>. For information on deploying and configuring these special Group Policy, please see How to use Group Policy to deploy a Known Issue Rollback (https://docs.microsoft.com/troubleshoot/windows-client/group-policy/use-group-policy-to-deploy-known-issue-rollback). Group Policy downloads with Group Policy name: - Download for Windows 11, version 22H2 (https://download.microsoft.com/download/7/c/c/7cc024d7-3953-4f65-997a-0c916c4a9e5b/Windows%2011%2022H2%20KB5027303%20230528_03453%20Known%20Issue%20Rollback.msi) - Windows 11 22H2 KB5027303 230528_03453 Known Issue Rollback - Download for Windows 11, version 21H2 (https://download.microsoft.com/download/b/0/c/b0c23115-b73b-4b98-99ae-88ae48a7d63a/Windows%2011%20(original%20release)%20KB5028245%20230630_032045%20Known%20Issue%20Rollback.msi) - Windows 11 (original release) KB5028245 230630_032045 Known Issue Rollback - Download for Windows 10, version 22H2 (https://download.microsoft.com/download/7/3/e/73e2df60-4014-4c4b-8016-e1358bda3351/Windows%2010%2020H2,%2021H1,%2021H2%20and%2022H2%20KB5028244%20230627_173555%20Known%20Issue%20Rollback.msi) - Windows 10 20H2, 21H1, 21H2 and 22H2 KB5028244 230627_173555 Known Issue Rollback Important: You will need to install and configure the Group Policy for your version of Windows to resolve this issue. You will also need to restart your device(s) to apply the group policy setting. Affected platforms: - Client: Windows 11, version 22H2; Windows 10, version 22H2; Windows 11, version 21H2 - Server: None Click here (https://admin.microsoft.com/Adminportal/Home?#/windowsreleasehealth/:/wrhpreferences) to manage email notifications for Windows known issues ------------------------------------------------------ July 25, 2023 21:51 PM After installing KB5028245 (https://support.microsoft.com/help/5028245) or later updates, some apps might fail to playback, record, or capture video when using the WVC1 codec (VC-1) (https://learn.microsoft.com/windows-hardware/drivers/display/vc-1). Certain cameras or webcams might also fail to work if they use the WVC1 codec by default. Resolution: This issue is resolved using Known Issue Rollback (KIR) (https://techcommunity.microsoft.com/t5/windows-it-pro-blog/known-issue-rollback-helping-you-keep-windows-devices-protected/ba-p/2176831). Please note that it might take up to 24 hours for the resolution to propagate automatically to consumer devices and non-managed business devices. Restarting your Windows device might help the resolution apply to your device faster. For enterprise-managed devices that have installed an affected update and encountered this issue, it can be resolved by installing and configuring a special Group Policy. The special Group Policy can be found in Computer Configuration -> Administrative Templates -> <Group Policy name listed below> For information on deploying and configuring these special Group Policy, please see How to use Group Policy to deploy a Known Issue Rollback (https://docs.microsoft.com/troubleshoot/windows-client/group-policy/use-group-policy-to-deploy-known-issue-rollback). Group Policy downloads with Group Policy name: - Download for Windows 11, version 22H2 (https://download.microsoft.com/download/7/c/c/7cc024d7-3953-4f65-997a-0c916c4a9e5b/Windows%2011%2022H2%20KB5027303%20230528_03453%20Known%20Issue%20Rollback.msi) - Windows 11 22H2 KB5027303 230528_03453 Known Issue Rollback - Download for Windows 11, version 21H2 (https://download.microsoft.com/download/b/0/c/b0c23115-b73b-4b98-99ae-88ae48a7d63a/Windows%2011%20(original%20release)%20KB5028245%20230630_032045%20Known%20Issue%20Rollback.msi) - Windows 11 (original release) KB5028245 230630_032045 Known Issue Rollback - Download for Windows 10, version 22H2 (https://download.microsoft.com/download/7/3/e/73e2df60-4014-4c4b-8016-e1358bda3351/Windows%2010%2020H2,%2021H1,%2021H2%20and%2022H2%20KB5028244%20230627_173555%20Known%20Issue%20Rollback.msi) - Windows 10 20H2, 21H1, 21H2 and 22H2 KB5028244 230627_173555 Known Issue Rollback Important: You will need to install and configure the Group Policy for your version of Windows to resolve this issue. You will also need to restart your device(s) to apply the group policy setting. Affected platforms: - Client: Windows 11, version 22H2; Windows 10, version 22H2; Windows 11, version 21H2 - Server: None