Turn off Core Isolation/Memory Integrity in Windows settings.
While highly effective during the Windows XP, 7, and early Windows 10 eras, the Universal BIOS Backup Toolkit 3 has significant limitations on modern PCs:
While it works for most legacy BIOS and many UEFI systems, it may fail on some very modern motherboards with strict security (like Secure Boot or TPM). Identification: Universal Bios Backup Toolkit 3
Alternatively, use or AMIDEDOS to open the file. If it loads without errors, you have a valid dump.
Automatically identifies the capacity of the BIOS chip (e.g., 1MB, 2MB, 4MB, 8MB, or 16MB). Turn off Core Isolation/Memory Integrity in Windows settings
Determines the memory mapping structure based on the motherboard’s northbridge or processor architecture.
file without needing to enter the BIOS menu or use DOS-based tools. Portability: If it loads without errors, you have a valid dump
Also, Because it writes directly to low-level memory addresses (ring 0), expect a false positive. You will need to whitelist the folder.