Forum Discussion

Poapba's avatar
Poapba
Tin Contributor
Jul 31, 2026

UEFI Firmware Corruption! What should i do?

My Windows 10 PC is stuck in a boot loop with "UEFI Boot Device Not Found" errors, and I suspect the UEFI firmware has become corrupted after a failed system update. I would greatly appreciate any st...
security
Jamony's avatar
Jamony
MCT
Jul 31, 2026

“UEFI Boot Device Not Found” does not by itself prove that the firmware is corrupted; it can mean the firmware cannot see the drive or its Windows Boot Manager entry. Do not flash the motherboard yet. Power off, disconnect unnecessary USB devices, enter UEFI setup, and check whether the SSD and Windows Boot Manager are listed. Do not change SATA/AHCI/RAID mode or erase Secure Boot keys. If the drive is detected, boot from Microsoft Windows 10 installation media, choose Repair your computer > Troubleshoot > Advanced options > Startup Repair. Have the BitLocker recovery key available before using recovery tools; without it, encrypted data may be inaccessible. If the SSD is absent, run the manufacturer’s storage diagnostic or service it before further writes. Reflash firmware only with the exact PC or motherboard manufacturer’s documented recovery procedure and image, using stable AC power. Back up the drive externally first if possible.