Game Freezes or Crashes When Alt-Tabbing
What is this error?
Game freezes, crashes, or shows a black screen when alt-tabbing out and back in. Common with exclusive fullscreen games.
Common causes
- exclusive fullscreen losing D3D device on alt-tab
- GPU driver not handling display mode switch
- game engine doesn't support alt-tab properly
- multi-monitor setup complicating display switching
How to fix it
- Switch to Borderless Windowed mode
- update GPU driver
- disable fullscreen optimizations
Too many steps? Crashless can diagnose this automatically — checks your drivers, temps, VRAM, and 400+ known error patterns.
Get free AI diagnosis Detailed analysis
Alt-tabbing crashes or freezes your game — this is one of the most common gaming annoyances, especially with older or exclusive fullscreen games.
How to fix it:
- Switch to Borderless Windowed mode (sometimes called 'Windowed Fullscreen') — this is the #1 fix. Borderless mode doesn't need to switch display modes when you alt-tab
- If Borderless isn't available or causes performance issues, disable Fullscreen Optimizations: right-click game exe > Properties > Compatibility > check 'Disable fullscreen optimizations'
- Update your GPU driver — driver improvements for display mode switching are common
- For multi-monitor setups: the second monitor can complicate the switch. Try disabling the secondary display while gaming
- Disable overlays (Discord, NVIDIA, Steam) — they can interfere with the display mode transition
- If the game shows a black screen after alt-tab but audio continues, try pressing Alt+Enter twice (toggles fullscreen off and on)
- Some games have a '-windowed' or '-borderless' launch option you can add in Steam
- Avoid alt-tabbing during loading screens — games are most vulnerable to D3D device loss during resource transitions
When to seek help
If this error keeps happening after trying the fixes above, it may point to a deeper hardware or system issue. Consider professional help if:
- The crash occurs across multiple games or applications
- You see the same error after a clean Windows install
- Your PC is less than a year old (could be a warranty issue)
- You smell burning or hear unusual sounds from your PC
Or let Crashless do the deep analysis for you -- our AI checks drivers, temps, event logs, and 400+ known patterns automatically.
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