Nothing kills the fun of launching a new Steam game faster than a scary system error. One of the most confusing ones? Secure Boot detection error. It pops up. The game refuses to start. And suddenly you are deep in BIOS talk. Not exactly fun.
But don’t worry. This guide will walk you through it in simple steps. No tech degree needed. Just follow along.
TL;DR: The Secure Boot detection error usually happens because Secure Boot is disabled, misconfigured, or conflicting with certain system settings. You can fix it by enabling Secure Boot in BIOS, switching to UEFI mode, updating keys, or disabling conflicting features like CSM. In most cases, it takes less than 15 minutes. Follow the steps below carefully and your game should launch normally.
What Is Secure Boot and Why Does Steam Care?
Secure Boot is a security feature built into your computer’s firmware (UEFI). It ensures your PC only runs trusted software when starting up.
Some multiplayer games on Steam use anti-cheat systems like:
- Easy Anti-Cheat (EAC)
- Riot Vanguard
- BattlEye
These tools sometimes require Secure Boot to be enabled. If it’s off or misconfigured, the game blocks you.
Annoying? Yes. Fixable? Also yes.
Step 1: Check If Secure Boot Is Enabled
First, let’s confirm your system status.
- Press Windows + R.
- Type msinfo32.
- Press Enter.
- Look for Secure Boot State.
You’ll see one of three messages:
- On → Secure Boot is enabled.
- Off → It’s disabled.
- Unsupported → Your system is not using UEFI mode.
If it says On and you’re still getting errors, skip to Step 4.
If it says Off or Unsupported, keep going.
Step 2: Enter BIOS (UEFI Firmware Settings)
This part sounds scary. It isn’t.
To enter BIOS:
- Restart your PC.
- While booting, press one of these keys repeatedly:
- F2
- Delete
- F10
- F12
The correct key flashes briefly on startup.
If that fails:
- Go to Settings → System → Recovery
- Click Advanced Startup
- Select UEFI Firmware Settings
Your PC will reboot into BIOS automatically.
Step 3: Enable Secure Boot Properly
Once inside BIOS:
- Find the Boot or Security tab.
- Locate Secure Boot.
- Set it to Enabled.
But wait. There’s a catch.
If Secure Boot is greyed out, you must:
- Disable CSM (Compatibility Support Module)
- Switch Boot Mode to UEFI
Secure Boot only works in UEFI mode. Not Legacy.
Save changes and exit (usually F10).
Boot back into Windows and check msinfo32 again.
Step 4: Convert MBR to GPT (If Needed)
If your PC is using Legacy BIOS mode, Secure Boot won’t work.
You need:
- UEFI mode
- GPT partition style
Check your drive:
- Right-click Start.
- Select Disk Management.
- Right-click Disk 0 → Properties.
- Go to Volumes tab.
- Look at Partition Style.
If it says MBR, you must convert it.
Good news. Windows has a built-in tool.
Open Command Prompt as Administrator and run:
mbr2gpt /convert /allowFullOS
After conversion:
- Restart
- Enter BIOS
- Switch to UEFI
- Enable Secure Boot
Done.
Step 5: Restore Secure Boot Keys
Sometimes Secure Boot is on, but the keys are broken.
This happens after:
- BIOS updates
- Hardware changes
- Resetting firmware
In BIOS:
- Go to Secure Boot settings.
- Select Restore Factory Keys or Install Default Keys.
- Save and exit.
This refreshes the authentication database.
Step 6: Update Your BIOS
Still stuck?
Your motherboard BIOS might be outdated.
Visit your:
- Motherboard manufacturer website
- Laptop brand support page
Download the latest BIOS version.
Warning: Only update BIOS if necessary. Follow official instructions carefully. Do not turn off your PC during the update.
A BIOS update often fixes Secure Boot bugs instantly.
Step 7: Check These Common Conflicts
Some settings block Secure Boot from working correctly.
Disable Fast Boot
- Found in BIOS Boot menu
Disable CSM
- Must be disabled for UEFI Secure Boot
Turn Off Test Signing Mode
Open Command Prompt as Admin:
bcdedit /set testsigning off
Disable Unsupported Hardware Drivers
Old or unsigned drivers sometimes trigger detection errors.
Comparison Chart: Fix Methods Overview
| Fix Method | Difficulty | Time Needed | When to Use It |
|---|---|---|---|
| Enable Secure Boot | Easy | 5 minutes | If Secure Boot is OFF |
| Switch to UEFI Mode | Medium | 10 minutes | If system shows Unsupported |
| Convert MBR to GPT | Medium | 15 minutes | If disk uses MBR |
| Restore Factory Keys | Easy | 5 minutes | If Secure Boot is on but error persists |
| Update BIOS | Advanced | 20 minutes | If firmware is outdated |
Step 8: Verify Game Files in Steam
Sometimes the issue is not Secure Boot itself.
Corrupted game files can trigger false detections.
In Steam:
- Right-click the game.
- Click Properties.
- Select Installed Files.
- Click Verify integrity.
Steam will repair broken files automatically.
Step 9: Reinstall Anti-Cheat
Easy Anti-Cheat and BattlEye can break.
To repair:
- Go to the game’s installation folder.
- Find the EasyAntiCheat folder.
- Run the setup file.
- Select Repair.
Restart your PC afterward.
What If Secure Boot Is Enabled but Error Remains?
Check these final things:
- Windows is fully updated
- TPM 2.0 is enabled
- No custom bootloaders installed
- No dual-boot Linux configuration interfering
Some systems with dual boot need manual configuration adjustments.
Is It Safe to Enable Secure Boot?
Yes.
For most users, Secure Boot improves system security.
It prevents rootkits and low-level malware from loading during startup.
The only downside? It can complicate custom OS setups.
For gaming? It’s perfectly fine.
Final Thoughts
The Secure Boot detection error looks intimidating. But it usually comes down to one of three things:
- Secure Boot is disabled
- Your system is in Legacy mode
- Keys need restoration
Most fixes take under 15 minutes.
No expensive tools needed. No reinstalling Windows. No panic.
Just a few BIOS adjustments and you’re back in the game.
Now go launch that Steam title again. This time, it should actually start.
Game on.
