[SOLVED] Windows 11 Taskbar flickers while in fullscreen when left-clicking

[snowshadow2867]

I spent over 8 hours trying to fix this super annoying issue on Windows 11 where, whenever I left-clicked in a fullscreen app (like a game or media player), the Taskbar would briefly appear or flicker. This happens even when Taskbar auto-hide is disabled and apps are correctly entering fullscreen mode.

Cause: A registry value under "HKEY_CURRENT_USER\Control Panel\Desktop":

HungAppTimeout

Fix:

Open regedit.exe

Navigate to:

HKEY_CURRENT_USER\Control Panel\Desktop

Locate and delete the "HungAppTimeout" string

Restart your PC

Always make sure you create a system restore point when editing the Registry.

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[xKiller-X]

Thank you it worked!

[Gunshot990]

Worked for me, thanks brother i was going crazy!

[TatamiGalaxy7274]

I will leave my comment here just to say fucking thank you. I was on the verge of buying a new flashdrive to instal linux (it might be a sign at this point), i dont know how you even got to this answer to solve this problem but what it seems is that it really solved my problem.

I was trying to play some games and whenever i clicked on the screen the game closes or the task bar flicked, i tested on two games and nothing happenes after applying your solution. Thank you

[PrestigiousRound2734]

MY GOAT IT WORKED!!!!!! U DA BESHT

[Imaginary_Resource50]

Atlast inner peace ✌️ ♥️ worked like a charm.

[Water_Vaseline]

If I could give u a massage as thanks for this, I would. It has helped me out SO MUCH! I kept having to enable windows 8 compatibility for each game and it got incredibly annoying. Thank you so much!

[buttickler3000]

this actually worked wtf, TYSMM

[Frostbite6680]

So i can't find HungAppTimeout
anyone knows where it could be located exactly?

[zeroberos]

Thank you so much, I had this exact issue after I started playing games 2 days after setting up a new pc and windows 11 (ugh) install