Microsoft has acknowledged multiple glitches in Windows 11 that disrupt regular use, including taskbar failures, File Explorer freezing, and delays during the startup of games or other programs. The firm is rolling out initial solutions for these problems. Below, we outline the reasons behind them and guidance on applying the patch.
Over recent weeks, numerous reports have surfaced regarding Windows 11's taskbar malfunctions. As noted by Windows Latest, the element may vanish abruptly, restart unexpectedly, or become completely non-functional. Microsoft attributes this to a flaw in explorer.exe, activated by specific incoming alerts.
Such issues might arise without fresh alerts, provided there are pending ones in the Notification Center. While Microsoft offers no in-depth explanation, it verifies that the glitch is resolved via the December optional patch KB5070311, corresponding to builds 26200.7309 and 26100.7309.
Microsoft has for the first time recognized that momentary pauses can happen when initiating games and applications on setups with ultra-high resolution or elevated refresh rate screens. Various software checks available display modes and rates upon booting, a procedure that functions properly yet leads to temporary freezes on advanced monitors.
This patch aims to minimize these interruptions, particularly during game launches, resolution adjustments, or access to screen utilities. It leaves runtime performance, such as in-game operation, unaffected.
That said, the patch itself brings along fresh bugs.
Microsoft advises users to weigh the decision to apply this non-essential update immediately or hold off for the required Patch Tuesday release scheduled for December 9, 2025. These routine updates tend to be more reliable and will address the emerging display-related problems.
Individuals experiencing taskbar disruptions or startup hesitations might benefit from the optional patch now. Those without current issues are better off awaiting Patch Tuesday.
To apply the December KB5070311 patch, launch the Start menu, go to Settings, select Update & Security, and then Windows Update. Look under 'Available optional updates' for the option to grab and install it. As another choice, obtain the file for your system straight from the Microsoft Update Catalog.
This piece first ran in our affiliate outlet PC-WELT, adapted and translated from its German version.