This error means that Intel Boot Guard couldn’t check the firmware because the digital signatures do not match the system’s security key. The main reason for this error is a bad or missing Boot Policy Manifest (BPM). This usually happens because the BIOS is broken or does not match, often after using a modified BIOS or swapping in a motherboard with different firmware settings. Warning: Please proceed with caution. If you are not familiar with BIOS troubleshooting, making changes can risk permanently damaging (“bricking”) your computer.
1. Update Your System’s BIOS to the Latest Version
The BIOS is regularly updated to support new hardware and fix known issues. If you are running an outdated version, you might see the Boot Guard verification error. Updating your BIOS to the latest version can often fix this problem.
2. Use the BIOS Recovery Tool
If you cannot boot into your system to update the BIOS in the usual way, try using the built-in BIOS Recovery Tool (if your computer supports it). This tool is made to help fix a corrupted BIOS, either from a recovery file on your hard drive or a USB device. Below we explain the steps for Dell computers as an example. If these steps have not worked, check to see if your computer uses multi-BIOS (also called Dual BIOS). Make sure that both BIOS chips are updated to the same version. If you are still experiencing the issue, the root cause may be a corrupt BIOS or a damaged motherboard. In this case, it’s best to take your PC to a professional repair shop. Note: If none of these methods works, you can also follow the official recovery instructions on the Dell website to recover the BIOS on Dell computers.
