Microsoft has acknowledged and fixed a color rendering issue in Windows 11 that caused some videos and games to appear with a red tint after recent updates, including the August optional update (KB5064081).
The company confirmed that the fix is included in the optional update for October 2025 (KB5067036) and will be rolled out more widely in the upcoming November Patch Tuesday release.
Although not widespread, the glitch caused confusion among users who reported reddish hues in HDR videos and games. Microsoft attributed the issue to a bug in how Windows 11 handled colour rendering, particularly when adjusting brightness and high dynamic range (HDR) settings.
“After you install KB5064081, some videos and games might be unexpectedly red,” Microsoft noted in its release documentation, adding that the issue has now been resolved.
Rendering Glitch When Full-Screen Apps Run in the Background
In addition to the red-tint bug, Microsoft addressed another graphics rendering issue that affected users running full-screen apps or games in the background. The bug caused partial updates of onscreen content — for instance, when users scrolled through browsers like Microsoft Edge or Google Chrome, only parts of the webpage would refresh.
The company explained the issue as follows:
“Apps and browsers might display partially unresponsive onscreen content when other maximized or full-screen apps are updating in the background. This issue is especially noticeable when scrolling, as only parts of the window content might update.”
Tests conducted by Windows Latest confirmed the glitch and ruled out GPU driver problems, indicating the root cause was within Windows itself rather than hardware-related.
Microsoft has also resolved a related issue that caused text to render incorrectly in apps like Microsoft Word or online text editors when editing documents.
The fixes included in KB5067036 are part of a gradual rollout. Users who have not yet received the update may need to wait until November 11, when Microsoft is expected to distribute it more widely as part of the monthly Patch Tuesday cycle.
New Issue: Task Manager Fails to Close Properly
While the October update delivers several important fixes, it introduces a new problem affecting Task Manager. According to Microsoft, the app continues to run in the background even after being closed, potentially consuming system resources and degrading performance.
Testing by Windows Latest revealed that the “X” close button no longer terminates the Task Manager process, leaving multiple instances running invisibly in the background.
Microsoft confirmed the issue and warned that having multiple Task Manager processes active simultaneously could cause performance slowdowns. A fix for this new bug is expected to arrive in the November Patch Tuesday update.
What Users Should Do
- Install KB5067036 if available to resolve the red-tint and rendering issues.
- If the Task Manager remains running in the background, manually end its process via the Details tab or the Command Prompt until a permanent fix is available.
- Keep an eye out for November’s Patch Tuesday update, which is expected to deliver more comprehensive stability improvements.
