Activate Windows with BIOS ProductKey

Get key and Activate

Get Windows version:

Get Activation status:

0: Unlicensed 1: Licensed 2: Out-Of-Box Grace Period 3: Out-Of-Tolerance Grace Period 4: Non-Genuine Grace Period 5: Notification 6: Extended Grace
Get key:

Set Key:

Activate:

Upgrade Home to Pro:

Get key from registry:

$registryPath = "HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion"
$digitalProductId = (Get-ItemProperty -Path $registryPath -Name DigitalProductId).DigitalProductId
$keyOffset = 52
$isWin8OrLater = [math]::Floor($digitalProductId[66] / 6) -band 1
$digitalProductId[66] = ($digitalProductId[66] -band 0xF7) -bor (($isWin8OrLater -band 2) * 4)
$chars = "BCDFGHJKMPQRTVWXY2346789"
$productKey = ""
for ($i = 24; $i -ge 0; $i--) {
    $current = 0
    for ($j = 14; $j -ge 0; $j--) {
        $current = $current * 256
        $current = $digitalProductId[$j + $keyOffset] + $current
        $digitalProductId[$j + $keyOffset] = [math]::Floor($current / 24)
        $current = $current % 24
    }
    $productKey = $chars[$current] + $productKey
}
if ($isWin8OrLater -eq 1) {
    $keyPart1 = $productKey.Substring(1, $current)
    $keyPart2 = $productKey.Substring($current + 1, $productKey.Length - $current - 1)
    $productKey = $keyPart1 + "N" + $keyPart2
}
$formattedKey = ($productKey -split '(.{5})' | Where-Object { $_ }) -join '-'
Write-Host $formattedKey

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Activate Windows with BIOS ProductKey

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