[German]This week Microsoft has released preview updates for Windows 10 22H2 as well as Windows 11 21H2 – 22H2. Now the company reports that these updates may cause problems with applications. Some applications may not be able to play, record or capture video. Applications and cameras that use the WVC1 codec may not work as expected.
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The July 2023 preview updates
Preview updates are optional and by default must be manually triggered for download and installation. Only in Windows 11 22H2 is there an option to automatically offer the updates for installation. The preview updates are delivered in the fourth week of the month (D-Week) (see Optional Windows updates from April 2023 in 4th week of the month). I had provided information about these updates for Windows 10 and Windows 11 in subsequent blog posts.
- Windows 10 22H2 Preview Update KB5028244 (July 25, 2023)
- Windows 11 21H2: Preview-Update KB5028245 (July 25, 2023)
- Windows 11 22H2: Preview Update KB5028254 (July 26, 2023)
Personally, I don't recommend installing these preview updates, as Microsoft considers these patches more or less a testing opportunity for administrators to check for compatibility in enterprise environments. Provided there are no major problems, the fixes from the preview updates then flow into the security update of the following month.
Video issues through the preview updates
Within the Release Health Dashboard off Windows 10 22H2 and Windows 11 21H2-22H2, Microsoft has already posted an entry SSome apps might fail to playback, record, or capture video as of July 25, 2023 in the Known Issues or Resolved Issues section. It states:
After installing KB5027303 or subsequent updates, some apps may fail to playback, record, or capture video if they use the WVC1 codec (VC-1). Certain cameras or webcams may also not work if they use the WVC1 codec by default.
The following Windows versions or update packages are affected:
- Windows 10 22H2 Update KB5028244
- Windows 11 21H2: Update KB5028245
- Windows 11 22H2: Update KB5028254
To solve these problems, Microsoft has provided appropriate solutions via the Known Issue Rollback (KIR). On consumer systems, the KIR fix is rolled out automatically, but takes up to 24 hours to distribute. So the problem should be fixed on all unmanaged systems. If necessary, Windows should be restarted for the fix to take effect.
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For systems in companies managed by administrators, where the installed updates cause problems, a group policy provided by Microsoft for the Windows version in question must be downloaded and installed. The links to the download and application can be found in the post Some apps might fail to playback, record, or capture video.
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