Simple Script to force Windows 10 Update to recheck Win 11 requirments for offering upgrade. By @lava1879

WhyNotWin11.cmd

@echo off
setlocal EnableDelayedExpansion

fltmc >nul 2>&1
if errorlevel 1 (
    echo This script needs admin rights.
    powershell -Command "Start-Process cmd -ArgumentList '/c \"%~f0\"' -Verb RunAs"
    exit /b
)

set "0=%~f0" &powershell -nop -c $f=[IO.File]::ReadAllText($env:0) -split ':shellpower\:.*';iex($f[1])
exit /b

:shellpower:
Write-Host "=============================================" -ForegroundColor Cyan
Write-Host "      WhyNotWin11 - Upgrade to Windows 11"     -ForegroundColor Cyan
Write-Host "=============================================" -ForegroundColor Cyan

function Start-Appraiser {
	$TaskName = "Microsoft Compatibility Appraiser"
	$TaskPath = "\Microsoft\Windows\Application Experience\"

	Write-Host "`nRunning Compatibility Appraiser..."
	$null = Enable-ScheduledTask $TaskName $TaskPath
	Start-ScheduledTask $TaskName $TaskPath
	while ((Get-ScheduledTask $TaskName $TaskPath).State.value__ -eq 4) {Start-Sleep -Seconds 1}
	Write-Host "Task finished." -ForegroundColor Green

    Write-Host "`nOpening Windows Update..."
    Start-Process "ms-settings:windowsupdate"

    Write-Host "Attempting automatic 'Check for updates'..."
    try {
        cmd /c UsoClient.exe StartBypassScan
    } catch {}
}

Start-Appraiser

Write-Host "`nPress any key to exit..." -ForegroundColor Yellow
$null = $Host.UI.RawUI.ReadKey("NoEcho,IncludeKeyDown")
:shellpower:

As Windows doesn’t always re-evaluate Windows 11 compatibility immediately after you change BIOS/firmware settings. For example, if your PC was originally flagged as incompatible because fTPM was disabled or because you used Legacy boot + an MBR disk, and then you switch to UEFI + GPT (using MBR2GPT or other tools) and then enable TPM/Secure Boot, Windows Update may continue to show the “Your PC doesn't currently meet the minimum system requirements to run Windows 11” message until the next compatibility scan.

The scan is performed by the scheduled task Microsoft Compatibility Appraiser (compattelrunner.exe), which updates registry entries that Windows Update uses to determine upgrade eligibility. This script effectively forces that task to run immediately and then triggers Windows Update to re-check.

After doing such changes, running that script (or manually running the Compatibility Appraiser, then checking for updates) will usually make Windows detect the new configuration correctly.

Special thanks to @abbodi1406 & @BxOxSxS for helping with this.