Alt-Tab Flickers and Dies With Borderless Games? Fix It

You hit Alt-Tab to switch windows. The menu pops up — then blinks out instantly. Or it flickers like a strobe and snaps you back where you started.

Happens most with borderless games. Here’s what fixes it.

Why This Happens

Basically? A borderless window grabs the screen and refuses to let go of focus. So when you Alt-Tab, the menu and the game fight over who’s in charge. The menu loses and vanishes.

There’s a refresh-rate angle too. If the game runs at a slightly different rate than your desktop, the GPU stutters trying to switch between them. That stutter shows up as the flicker.

And overlay software piles on. Game bars, multi-monitor tools — anything that tracks window focus can slam the menu shut the second it appears.

Fix 1 – Turn Off Optimizations for Windowed Games

Start here. This Windows feature is the most common cause, and switching it off fixes Alt-Tab for a lot of people.

1 – Press Windows + I to open Settings.

2 – Go to System, then Display.

3 – Scroll down and click Graphics.

4 – Click Default graphics settings near the top.

5 – Find Optimizations for windowed games and toggle it Off.

6 – Restart your PC. The change doesn’t fully apply until you do.

Then test Alt-Tab with your game open. If the menu stays put now, you’re done. If it still blinks, the next fix digs deeper.

Table of Contents

Fix 2 – Match the Game’s Refresh Rate to Windows

If the game and your desktop run at even slightly different refresh rates, the GPU chokes during the switch. So make them identical.

1 – At first, press Windows + I, go to System section. Then, go to Display mode. Advanced display.

2 – Note down your current resolution. Check the refresh rate (like 144Hz) as well.

3 – Launch your game and open its video settings.

4 – Set the game’s resolution and refresh rate to the exact same numbers.

Same goes for both — not close, exact. A game capped at 143Hz against a 144Hz desktop is enough to cause the stutter.

Fix 3 – Shut Off Overlays and App Hooks

Background overlays love to grab focus.

1 – In Discord, go to User Settings > Advanced and turn off the in-game overlay and hardware acceleration.

2 – In GeForce Experience (or the NVIDIA App), turn off the in-game overlay.

3 – If you use DisplayFusion, open Settings > Advanced Settings, search for Disable Application Hooks, and set it to True.

4 – Restart the game.

Turn these off one at a time if you can. That way you’ll know exactly which overlay was the culprit.

Fix 4 – Force the Classic Alt-Tab Menu

The modern Alt-Tab menu is fancier, but it’s also the part that crashes against borderless windows. The old classic menu is rock solid.

1 – Press Windows + R, type regedit, and press Enter.

2 – Paste this into the address bar at the top and press Enter:

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer

3 – Right-click the Explorer folder, choose New > DWORD (32-bit) Value, and name it AltTabSettings.

4 – Double-click your new value and set the Value data to 1. Click OK.

5 – Open Task Manager, find Windows Explorer, right-click it, and choose Restart.

Now Alt-Tab shows the simpler, classic switcher. It skips the fancy preview thumbnails — but it doesn’t crash. Want the modern one back later? Just delete that AltTabSettings value.

Fix 5 – Turn Off Hardware-Accelerated GPU Scheduling

Worth a shot if the flicker hangs on.

1 – Go to Settings > System.

2 – Proceed to the Display section.

3 – Then, open up the Graphics settings.

4 – Set the Hardware-Accelerated GPU Scheduling to Off.

Restart your PC. This feature sometimes loses focus during the screen flip that happens when you switch between a borderless game and the desktop. Switching it off can settle the whole thing down.

How to Prevent This

– Keep Optimizations for windowed games off if borderless apps give you trouble.

– Run true Fullscreen instead of Borderless when a game lets you. Fullscreen sidesteps the focus mess entirely.

– Keep overlays trimmed down. The fewer apps grabbing focus, the smoother Alt-Tab behaves.