Fix Rust Launch Error AslO.sys / GVCIDrv64.sys (PC)

Many Rust players face a launch failure caused by AslO.sys or GVCIDrv64.sys. As a result, Rust crashes on startup or refuses to launch entirely. This error usually appears after an update or when anti-cheat systems detect incompatible drivers.

Fortunately, this issue is well-known and completely fixable. Below, you’ll learn why the error occurs and how to fix it step by step.

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What Causes AslO.sys / GVCIDrv64.sys Error in Rust?

Before applying fixes, it helps to understand the cause.

Common reasons include:

• ASUS motherboard utilities (AI Suite, Armoury Crate)
• Gigabyte utilities (App Center, RGB Fusion)
• Old kernel-level drivers blocked by Easy Anti-Cheat
• Incompatible overclocking software
• Windows security blocking unsigned drivers

Because Rust uses Easy Anti-Cheat (EAC), it blocks these drivers to protect the game environment.

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Fix 1: Uninstall ASUS AI Suite / Armoury Crate (AslO.sys)

First of all, remove ASUS utilities that install AslO.sys.

Steps:

1. Press Windows + I → Apps → Installed apps
2. Uninstall:
   • ASUS AI Suite
   • Armoury Crate
   • ASUS Aura
3. Restart your PC

In many cases, Rust launches normally after this step.

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Fix 2: Uninstall Gigabyte App Center (GVCIDrv64.sys)

If the error mentions GVCIDrv64.sys, Gigabyte software is the cause.

Steps:

1. Open Apps & Features
2. Uninstall:
   • Gigabyte App Center
   • RGB Fusion
   • EasyTune
   • SIV
3. Restart Windows

As a result, the blocked driver is removed.

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Fix 3: Delete Remaining Driver Files Manually

Sometimes, uninstalling software leaves drivers behind.

Steps:

1. Open File Explorer
2. Navigate to: C:\Windows\System32\drivers
3. Delete:
   • AslO.sys
   • GVCIDrv64.sys
4. Restart your PC

⚠️ Delete only the listed files.

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Fix 4: Disable Core Isolation (Memory Integrity)

Windows Security may conflict with old drivers.

Steps:

1. Open Windows Security
2. Go to Device Security
3. Click Core Isolation Details
4. Turn Memory Integrity OFF
5. Restart your PC

After restarting, try launching Rust again.

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Fix 5: Update BIOS and Chipset Drivers

Outdated firmware can cause driver conflicts.

Steps:

1. Visit your motherboard manufacturer’s website
2. Download latest:
   • BIOS
   • Chipset drivers
3. Install updates carefully
4. Restart your PC

Consequently, hardware compatibility improves.

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Fix 6: Verify Rust Game Files

Corrupted files can worsen launch issues.

Steps:

1. Open Steam → Library
2. Right-click Rust → Properties
3. Select Installed Files → Verify integrity
4. Wait for completion

Then restart Steam and launch Rust.

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Fix 7: Reinstall Easy Anti-Cheat

EAC may fail after driver conflicts.

Steps:

1. Open: Steam\steamapps\common\Rust\EasyAntiCheat
2. Run EasyAntiCheat_Setup.exe
3. Click Repair Service
4. Restart PC

This refreshes the anti-cheat system.

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Fix 8: Perform a Clean Boot

Background utilities can re-trigger the error.

Steps:

1. Press Windows + R → msconfig
2. Open Services
3. Check Hide Microsoft services
4. Click Disable all
5. Restart and test Rust

After testing, re-enable services normally.

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Additional Tips

• Avoid kernel-level RGB or tuning software
• Do not run third-party overclocking tools
• Keep Windows fully updated
• Use official motherboard drivers only

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Frequently Asked Questions (FAQs)

What is AslO.sys?

AslO.sys is a driver installed by ASUS utilities, often blocked by Easy Anti-Cheat.

What is GVCIDrv64.sys?

It’s a Gigabyte motherboard driver that conflicts with Rust’s anti-cheat.

Is deleting these drivers safe?

Yes, as long as you uninstall the related software first.

Will reinstalling Rust fix this?

Usually no. The issue is driver-related, not game-related.

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Conclusion

The Rust launch error caused by AslO.sys or GVCIDrv64.sys happens when Easy Anti-Cheat blocks incompatible motherboard drivers. By uninstalling ASUS or Gigabyte utilities, deleting leftover drivers, and repairing Easy Anti-Cheat, you can fix the issue quickly. Once resolved, Rust should launch without errors.

🎮 Survive Rust without launch crashes!