Exercise 2: A Machine Passes BIOS Setup But Fails the Windows 11 Installer — Possible Solution ==================================================================== WHAT "PASSING BUILD A NEW DEVELOPMENT PC 11's OWN WALKTHROUGH" ACTUALLY COVERS ------------------------------ Per this chapter's own compare-table, that walkthrough covers "general first-boot BIOS/UEFI setup for a freshly assembled machine - boot order, XMP memory profiles, fan curves." None of those are Windows 11-specific checks; they're the standard settings any OS install would care about. THE MOST LIKELY CAUSE ------------------------------ Per this chapter's own table, this chapter covers "the specific toggles inside that same screen... that Windows 11 specifically requires" - TPM (as Intel PTT or AMD fTPM) and Secure Boot - and states plainly that "a machine can pass every check in Build a New Development PC 11's own setup and still fail Windows 11's installer, if these two toggles are left off." The most likely cause is exactly that: TPM support and/or Secure Boot exist on the motherboard but are sitting disabled in firmware, since - per this chapter - they commonly "ship disabled by default, precisely because Windows 10 never required them." WHY THIS IS THE LIKELY CAUSE RATHER THAN A HARDWARE LIMITATION ------------------------------ General BIOS/UEFI setup (boot order, XMP, fan curves) has no dependency on TPM or Secure Boot at all - a machine can be configured correctly for those settings while TPM/Secure Boot sit completely untouched, since they live in a different section of the firmware menu. Passing one doesn't imply anything about the state of the other. THE FIX ------------------------------ Re-enter the BIOS/UEFI screen and locate the TPM setting (often listed under Security or Advanced, and labeled PTT on Intel systems or fTPM on AMD systems) and the Secure Boot setting (often under Boot), enabling both explicitly, then retry the Windows 11 installer. WHY THIS WORKS AS AN ANSWER ------------------------------ It distinguishes what the general BIOS walkthrough actually checks from what this chapter's own Windows-11-specific toggles cover, identifies the disabled-by-default TPM/Secure Boot settings as the most likely cause using this chapter's own stated reasoning, and gives the concrete fix rather than treating the failure as unexplained.