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.

[Wesly.Zhang]

Hello，

It's necessary to determine if there are any other network driver programs within the current system, and if the wireless network card has a dedicated driver. Will this blue screen issue no longer occur if you disable the wireless network driver?

[Voliv000]

20 hours ago, harlan4096 said:

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.

I've already done everything you mentioned, but unfortunately, the error persists. 

[Voliv000]

4 hours ago, Wesly.Zhang said:

Hello，

It's necessary to determine if there are any other network driver programs within the current system, and if the wireless network card has a dedicated driver. Will this blue screen issue no longer occur if you disable the wireless network driver?

Hello, Wesly

The BSOD always happens when I’m online or browsing. My Wi-Fi driver is Netwtw10.sys (Intel, 2023-03-23). I’ll try disabling it as suggested, but since the dump clearly shows klwtp.sys, it really seems related to Kaspersky.

Are you aware of any known issues between Kaspersky and Intel Wi-Fi drivers?