# CPU microcode ## Identification [[UEFI BIOS Updater|UBU]] is a community toolset historically used to inspect or update option ROMs, EFI drivers, and CPU microcode inside certain firmware images. [[AMI Aptio|AMI Aptio]] is an AMI UEFI firmware platform; [[CPU microcode|CPU microcode]] supplies processor corrections loaded by firmware or the OS. Community firmware tools can parse and rebuild images, but platform signatures, Intel Boot Guard, image layout, and vendor capsules can make apparently successful edits unbootable. ## Notebook evidence - [[Scanned_20260730-1719#PDF page 46 — UBU, MMTool, microcode, and AMI Aptio BIOS modding|PDF page 46: UBU, MMTool, microcode, and AMI Aptio BIOS modding]] — The author is researching repeatable module-level firmware maintenance: identify versions, extract components, replace option ROMs or microcode, and rebuild. This is a much more consequential form of “software update” than the Android app list on page 14. ## Relationships and overlays The source places this note in a shared evidence cluster with [[AMI Aptio|AMI Aptio]] · [[UEFI BIOS Updater|UEFI BIOS Updater]]. Within the larger collection, this evidence extends [[Vendor-Agnostic Recovery|vendor-agnostic recovery]] and [[Continuity Architecture|continuity architecture]] by showing how software, hardware, identity, and pre-OS control depend on recoverable interfaces. ## Evidentiary status and open leads Distinguish vendor-supported capsule updates from community image rebuilding. Require full-chip backup, hardware recovery, signed hash manifest, and board-specific validation. ## Source - [[Scanned_20260730-1719|Scanned_20260730-1719]]