mfewfpk.sys
McAfee / Trellix — McAfee firewall filter driver
When blamed in a crash: Very likely the true cause
What to do
McAfee's network filter driver.
- Update McAfee to the newest version.
- If crashes persist, remove with the MCPR removal tool, reboot, reinstall — or stay on Defender.
- On work machines with Trellix: report to IT.
Official download (the vendor's own site — never use third-party "driver download" sites):
https://www.mcafee.com/support
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