How to Fix BEDaisy.sys Blue Screen Error in Windows 11

The BEDaisy.sys blue screen error in Windows 11 is often linked to BattleEye anti-cheat software, overclocking, or system instability. Here’s a full troubleshooting guide to help you fix this error and prevent further BSODs.

Common Causes of BEDaisy.sys Blue Screen

• Overclocked CPUs or GPUs
• Corrupt BattleEye files
• Conflicting third-party antivirus software
• Memory issues
• Corrupt system files

Step-by-Step Fixes

1. Disable Overclocking

If you’ve used third-party tools to overclock, disable them:

• Press Start → Settings → Apps → Installed Apps
• Search for any overclocking software (e.g., MSI Afterburner)
• Click the three dots → Uninstall → Confirm

Through Power Settings:

1. Press Windows + S, type Control Panel, and open it
2. Set View by: Large Icons → Click Power Options
3. Click Change plan settings on your current power plan
4. Select Change advanced power settings
5. Expand Processor power management
   • Set Maximum processor state to 99% (both “On battery” and “Plugged in”)
   • Optionally, reduce Minimum processor state
6. Click Apply → OK
7. Restart your PC

2. Uninstall and Reinstall BattleEye Properly

1. Download uninstall.exe for BattleEye from the official site (link provided in video description)
2. Run the tool and follow the prompts to remove BattleEye
3. Restart your PC
4. Reinstall the game that uses BattleEye to reinstall the service

3. Temporarily Uninstall Third-Party Antivirus

Antivirus tools may interfere with BattleEye or system files:

• Go to Settings → Apps → Installed Apps
• Locate your antivirus software
• Click three dots → Uninstall

4. Run System File Checker (SFC) and DISM

Open Command Prompt as Administrator:

• Press Start, type CMD, right-click → Run as administrator

Run SFC:

sfc /scannow

Run DISM:

DISM /Online /Cleanup-Image /CheckHealth
DISM /Online /Cleanup-Image /ScanHealth
DISM /Online /Cleanup-Image /RestoreHealth

• Restart your PC after all scans complete

5. Run Windows Memory Diagnostic

Faulty RAM can trigger BSODs:

1. Press Windows + S, type Windows Memory Diagnostic
2. Select Restart now and check for problems
3. PC will reboot and scan memory

Log results are available in Event Viewer under:
Windows Logs → System → Filter by source: MemoryDiagnostics-Results

6. Use System Restore

If the BEDaisy.sys BSOD started recently:

1. Press Start, type Restore, and select Create a restore point
2. Click System Restore → Choose a different restore point
3. Select a date before the issue started
4. Click Next → Finish → Confirm

Final Tips

• Ensure Windows and drivers are fully updated
• Avoid installing multiple anti-cheat tools
• Run regular memory and disk checks
• Avoid aggressive system tweaking unless necessary

Frequently Asked Questions

What is BEDaisy.sys?

It’s a driver file from the BattleEye anti-cheat system, commonly used in online games. Crashes related to it are typically caused by corrupted files, overclocking, or software conflicts.

Can I delete BEDaisy.sys?

Not directly. Instead, uninstall BattleEye via its uninstaller or remove the game using it. Deleting the file alone won’t fix the issue and may cause more problems.

Is this a hardware issue?

Usually not, but faulty RAM or an unstable overclock can contribute. Running memory diagnostics can help identify such problems.

Final Say

Fixing the BEDaisy.sys blue screen error in Windows 11 requires a methodical approach. By disabling overclocking, repairing system files, and managing anti-cheat tools correctly, you can eliminate this error and restore system stability.

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