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Fix: EFI USB Device has Been Blocked by Security Policy
This problem is due to the Secure Boot feature from BIOS
2 min. read
Updated onOctober 10, 2024
updated onOctober 10, 2024
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If you see theEFI USB device has been blocked by security policyerror when trying to use abootable USB driveon your Windows PC, it’s due to the Secure Boot feature blocking access.
To help you fix this, we’ll show you how to disable secure boot and reset BIOS. So, if you’re ready to get your system running the way you want, just keep reading.
How can I fix the device has been blocked error in Windows 11?
1. Disable Secure Boot
Some users may need to set an admin password to change theSecure Boot setting. If that option isn’t accessible, try selecting the Set Administrator Password option within the BIOS first.
2. Reset BIOS to default settings
There aren’t many ways to fix theEFI USB device has been blocked by security policyerror, but the options above are proven to work.
Because this issue appeared while trying to boot from a USB stick, here’s our guide onhow to create a Windows 11 bootable USB drive.
Did you manage to clear this problem? If you have any issues, feel free to use the comments section below.
More about the topics:USB issues
Matthew Adams
Windows Hardware Expert
Matthew is a freelancer who has produced a variety of articles on various topics related to technology. His main focus is the Windows OS and all the things surrounding it.
He is passionate about the tech world, always staying up-to-date with the latest and greatest. With an analytical view, he likes problem-solving, focusing on errors and their causes.
In his free time, he likes to read and write about history and tries to always develop new skills.
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Matthew Adams
Windows Hardware Expert
He is passionate about everything surrounding Microsoft’s OS, focusing on troubleshooting guides & tips for everyday problems.
