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mwac.sys causing BSOD (BAD_POOL_CALLER)

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I'm constantly getting BSODs with the error BAD_POOL_CALLER. It usually happens when I start up my computer and open Chrome. I ran WhoCrashed and it's telling me that it's probably caused by mwac.sys and ntoskrnl.exe.


Edited by liewcake

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1 hour ago, liewcake said:

I'm constantly getting BSODs with the error BAD_POOL_CALLER.

Could you add you add the program folder to your pia VPN software to Malwarebytes exclusions, please.  

C:\Program Files\pia_manager


Edited by Porthos

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4 minutes ago, liewcake said:


Please keep me informed of the results.

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So it just crashed again with the same BSOD error code. Same as before, turned on my computer after not using it for more than 12 hours, opened chrome and it crashed. When it restarted my usb keyboard wouldn't work but my mouse would work, so I restarted it again and now everything is ok.

Regarding PIA, I would only connect to it when I need to use the VPN, otherwise it remains off. It doesn't connect on startup and I'm using their client.

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Can you please zip up the file at C:\WINDOWS\MEMORY.DMP and upload it here? If it's too large to attach, you can use wetransfer.com to send the file to me at dcollins@malwarebytes.com

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It seems like the problem has gone away. Turns out my BitDefender was having some issues with updating and that was somehow affecting my system. After I fixed that everything seems to be working normally.

Thanks everyone for the help!

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