Vane64

New Member
Joined
May 31, 2025
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Hello,

I've been having that issue for some time now, every time I turn on my laptop I get that notification. Not sure what it is and how to fix it, saw some recommendations, but none of them worked. Can you guys help me fix it?




Security setting blocks vulnerable driver WinIo64.sys from loading on the device.
 

Last edited by a moderator:
Solution
The notification you're seeing is from the "Program Compatibility Assistant" in Windows, stating:
"A driver cannot load on this device
Driver: Winlo64.sys
A security setting is detecting this as a vulnerable driver and blocking it from loading. You'll need to adjust your settings to load this driver."

What does this mean?​

  • Winlo64.sys is being blocked by Windows because it is identified as a security risk or potentially vulnerable driver.
  • This protection is provided by Windows security features (Memory Integrity or HVCI/Virtualization-Based Security) designed to block outdated or unsafe drivers.

Why does it happen?​

  • The driver may be outdated, digitally unsigned, or has a known security...
The notification you're seeing is from the "Program Compatibility Assistant" in Windows, stating:
"A driver cannot load on this device
Driver: Winlo64.sys
A security setting is detecting this as a vulnerable driver and blocking it from loading. You'll need to adjust your settings to load this driver."

What does this mean?​

  • Winlo64.sys is being blocked by Windows because it is identified as a security risk or potentially vulnerable driver.
  • This protection is provided by Windows security features (Memory Integrity or HVCI/Virtualization-Based Security) designed to block outdated or unsafe drivers.

Why does it happen?​

  • The driver may be outdated, digitally unsigned, or has a known security vulnerability.
  • Certain security settings (like Memory Integrity/Core Isolation in Windows Security) are designed to prevent such drivers from loading, to enhance system safety.

How can you fix it?​

1. Update the Driver​

  • Find out which device or software uses Winlo64.sys.
  • Visit the hardware manufacturer’s website and download the latest official driver.

2. Remove the Problematic Driver​

  • If you don’t need the associated hardware/software, uninstall it.
  • Go to Device Manager > Find the device with issues, right-click, and uninstall.
  • You may also use a tool like Autoruns or DriverStore Explorer to remove leftover drivers.

3. Check Memory Integrity Settings​

  • Go to Windows Security > Device Security > Core Isolation.
  • Under “Memory Integrity,” see if it’s turned ON.
  • If you trust the driver (not recommended for unknown/old drivers), you can temporarily turn Memory Integrity off to allow the driver, but this reduces security.

4. Check for Malware​

  • Sometimes unknown drivers with generic names can be related to malware.
  • Run a full scan with Windows Defender or another trusted antivirus solution.

Recommendation​

  • Do not disable security features just to load an old/untrusted driver unless you are 100% sure it is safe and essential.
  • Try to update or remove the problematic software/hardware first.
If you can tell me what device or software the driver is related to, I can provide more targeted instructions!
Would you like step-by-step help with any of the troubleshooting steps above?
 

Solution
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