A recent bug in Windows 11 has caused some users to see a red cast on their screens when playing games or watching videos, especially after installing the KB5064081 update in August. Microsoft has confirmed the issue and released a fix with the more recent KB5067036 update. However, this new update also brings other problems, such as partially unresponsive screen content and issues with Task Manager not closing properly.
Microsoft initially installed KB5064081 to improve color rendering in HDR, but it introduced a bug that causes a red cast on some PCs. The company has released the fix for this issue, which is included in the upcoming November Patch Tuesday. This update aims to resolve the problem for all users and also introduces new features like the redesigned Start menu.
Despite the improvements, the KB5067036 update itself has some bugs, including issues with Task Manager not closing properly. Users who are not interested in the redesigned Start menu may want to wait until the next mandatory update.
The red cast bug was first noticed after installing the optional KB5064081 update, which was released in August. Microsoft has confirmed that this issue is related to a problem with color rendering in HDR and will be fixed with the upcoming Patch Tuesday.
Source: https://www.pcworld.com/article/2960377/major-bug-in-windows-11-has-users-suddenly-seeing-red.html