Cause 1: Outdated Graphics Driver – The Silent Killer
If your game flashes a black screen then dies, or gives you a vague "DXGI_ERROR_DEVICE_REMOVED" error, the odds are your GPU driver is stale. I've seen this on everything from a GTX 1060 to a RTX 4080. The reason this matters: modern games enforce feature levels from the DirectX runtime, and if the driver doesn't expose the right features, the engine just bails.
Windows Update often installs a "compatible" driver that's actually months old. That's not a real driver—that's a placeholder.
The Fix
- Press Win + X and open Device Manager.
- Expand Display adapters, right-click your GPU, and select Uninstall device. Check the box that says Delete the driver software for this device if it appears. (This wipes the old driver entirely—don't skip it.)
- Download the latest driver from the GPU vendor's site. For NVIDIA, use their site—not GeForce Experience, which sometimes lags. For AMD, the Adrenalin pack is fine.
- Install with a Clean Installation option if available (NVIDIA has this in the installer, AMD's installer has a factory reset toggle).
Reboot, then launch the game. If you're on a laptop with dual GPUs, also make sure the game is set to run on the discrete GPU in Windows Settings > Display > Graphics.
Cause 2: Anti-Cheat Software Clashing with Your System
This one bites more people than you'd think, especially with multiplayer games like Fortnite, Valorant, or Call of Duty. The anti-cheat driver—often Easy Anti-Cheat or BattlEye—fails to load, and you get a cryptic error like "Game security violation detected" or it just silently closes.
What's actually happening here is that the anti-cheat driver is a kernel-level component. If your system has strict memory integrity (Core Isolation) enabled, or if you're running other overlay tools (Discord, MSI Afterburner, even some RGB software), the anti-cheat can't initialize properly. The game then refuses to start rather than risk a false positive.
The Fix
- First, verify the anti-cheat is installed. In Steam, right-click the game > Properties > Installed Files > Verify integrity of game files. That often re-provisions the anti-cheat service.
- If that doesn't work, temporarily disable Memory Integrity in Windows Security > Device Security > Core Isolation. This is a known conflict with several anti-cheat drivers, and you can turn it back on after the game launches—though honestly, if it breaks the game, leaving it off is a valid trade-off for most people.
- Close overlays: Discord overlay, GeForce Experience overlay, and MSI Afterburner's RivaTuner hook. I've fixed more than one crash by killing RivaTuner before booting a Ubisoft game.
One more thing: if you're on Windows 11 24H2, there's a known issue where older Easy Anti-Cheat versions won't bind to the network stack. Update your game—the patch is in the game's launcher, not Windows Update.
Cause 3: Windows Blocking the Executable
Sometimes the game's main .exe is blocked by Windows Defender or SmartScreen because it's a newly downloaded file with an unknown publisher. You double-click, nothing happens, or you get a dialog asking if you want to allow it. If you click "Run anyway" and it still crashes, the file is probably quarantined.
This also happens after a game update when the exe gets re-signed and Windows sees the new signature as untrusted.
The Fix
- Right-click the game's .exe (in the install folder, not the shortcut) and select Properties. Look at the General tab—if there's an "Unblock" checkbox, click it and hit Apply.
- If the file is missing or you get a "file is corrupt" error, check Windows Defender's quarantine list: Windows Security > Virus & threat protection > Protection history. Restore the file if it's there, then add the game's folder to the exclusion list to stop it happening again.
- For SmartScreen blocking, open the game's launch shortcut properties and set Run this program as an administrator. That bypasses some checks and also fixes games that need elevated file access (older titles are notoriously picky).
Note: don't disable Defender entirely. That's overkill and risky. Just exclude the game's folder and the launcher's folder—Steam or Epic—and move on.
Quick-Reference Summary
| Cause | Symptom | Fix |
|---|---|---|
| Outdated graphics driver | Black screen, device removed, crash on first cutscene | Clean reinstall latest GPU driver |
| Anti-cheat conflict | Security violation, silent close on multiplayer games | Verify files, disable memory integrity, kill overlays |
| Windows blocking exe | Nothing happens, SmartScreen prompt, quarantined | Unblock file, add to exclusions, run as admin |
These three causes cover the vast majority of "game won't launch" tickets I've seen in the last two years. Start with the driver, since it's the most common and the cleanest fix. If that doesn't work, move to anti-cheat. And if you're still stuck, check the Windows Event Viewer under Windows Logs > Application for the game's error—that'll point you to the exact DLL or module that failed.