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.
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.
Fix 1: Uninstall ASUS AI Suite / Armoury Crate (AslO.sys)
First of all, remove ASUS utilities that install AslO.sys.
Steps:
- Press Windows + I → Apps → Installed apps
- Uninstall:
- ASUS AI Suite
- Armoury Crate
- ASUS Aura
- Restart your PC
In many cases, Rust launches normally after this step.
Fix 2: Uninstall Gigabyte App Center (GVCIDrv64.sys)
If the error mentions GVCIDrv64.sys, Gigabyte software is the cause.
Steps:
- Open Apps & Features
- Uninstall:
- Gigabyte App Center
- RGB Fusion
- EasyTune
- SIV
- Restart Windows
As a result, the blocked driver is removed.
Fix 3: Delete Remaining Driver Files Manually
Sometimes, uninstalling software leaves drivers behind.
Steps:
- Open File Explorer
- Navigate to:
C:\Windows\System32\drivers - Delete:
AslO.sysGVCIDrv64.sys
- Restart your PC
⚠️ Delete only the listed files.
Fix 4: Disable Core Isolation (Memory Integrity)
Windows Security may conflict with old drivers.
Steps:
- Open Windows Security
- Go to Device Security
- Click Core Isolation Details
- Turn Memory Integrity OFF
- Restart your PC
After restarting, try launching Rust again.
Fix 5: Update BIOS and Chipset Drivers
Outdated firmware can cause driver conflicts.
Steps:
- Visit your motherboard manufacturer’s website
- Download latest:
- BIOS
- Chipset drivers
- Install updates carefully
- Restart your PC
Consequently, hardware compatibility improves.
Fix 6: Verify Rust Game Files
Corrupted files can worsen launch issues.
Steps:
- Open Steam → Library
- Right-click Rust → Properties
- Select Installed Files → Verify integrity
- Wait for completion
Then restart Steam and launch Rust.
Fix 7: Reinstall Easy Anti-Cheat
EAC may fail after driver conflicts.
Steps:
- Open:
Steam\steamapps\common\Rust\EasyAntiCheat - Run EasyAntiCheat_Setup.exe
- Click Repair Service
- Restart PC
This refreshes the anti-cheat system.
Fix 8: Perform a Clean Boot
Background utilities can re-trigger the error.
Steps:
- Press Windows + R → msconfig
- Open Services
- Check Hide Microsoft services
- Click Disable all
- Restart and test Rust
After testing, re-enable services normally.
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
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.
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!
