BAD_POOL_CALLER -> klwtp.sys

[Voliv000]

I'm experiencing a critical issue on my system related to the Kaspersky driver klwtp.sys, which is causing black screens (BSOD) with the error BAD_POOL_CALLER (0xC2), parameter 1 = 0x99, attempt to free pool with invalid address or pool header corruption. The active process during the crash is avp.exe, affecting the Windows Firewall driver fwpkclnt.sys. I created the incident request INC000017769801, but I am not having good support at all. Could anyone help me, please?

[harlan4096]

Welcome to Kaspersky Community.

 

Please provide versions of operating system and K. product.

[Voliv000]

On 9/20/2025 at 12:07 PM, harlan4096 said:

Welcome to Kaspersky Community.

 

Please provide versions of operating system and K. product.

Hello, Harlan. 

System: Windows 11 Home Single Language version 24H2
Kaspersky Premium 21.22.7.466(a)

[harlan4096]

Do You have enabled Kernel Isolation options in Your W11?

 

Also:

 

12 Ways to Fix Bad Pool Caller in Windows 10/8/7

• Restart your computer
• Undo recent changes to your computer
• Uninstall recently installed hardware or software
• Refresh Windows
• Update all drivers in Windows
• Run the Windows Memory Diagnostic
• Check for and repair hard drive corruption
• Check for and repair corrupted system files
• Run the Windows BSOD troubleshooter
• Restore your computer
• Reset your PC

 

But to fix that specific issue with K. driver, Your best bet is what You already did, contact to K. Support

 

I guess They requested You the full memory dump generated after the BSOD, to analyze it, the fix may take some time.