To change from Home to Pro after Version 1803 if you don't yet have a Pro Digital License on the device go offline by choosing Airplane Mode in Action Center by pressing the Windows (flag) + A keys. It will then allow you to copy and paste the Pro generic version key VK7JG-NPHTM-C97JM-9MPGT-3V66T at Settings > Update & Security > Activation Microsoft Windows 8.1 Professionnel (Professional) - 32 / 64 bits. Réf. : MS0019. 6,99 €. Contenu de la livraison : 1 clé d'activation (licence) valide à vie pour 1 PC. 1 lien de téléchargement (fichier d'installation officiel) 1 guide d'installation et d'activation. Quantité. Use ProduKey to View or recover Windows 10 product key. Step 1: Visit this page, scroll down to see download links, and click on the latest version of ProduKey link to download the zip file containing ProduKey. Extract the zip file to a new folder to get ProduKey.exe file. Step 2: Run ProduKey.exe file to view your Windows 10 product key. Here is the list of Windows 8.1 volume license keys: Windows 8.1 Pro key: GCRJD-8NW9H-F2CDX-CCM8D-9D6T9; Windows 8.1 Pro N key: HMCNV-VVBFX-7HMBH-CTY9B-B4FXY; After a week w/ all tiers of MS tech support & volume license support, finally got a tech support person to simply give me a Windows 8.1 home user single license to put in place of the volume license key I had. Wow. *Get your original license at the right price. Windows 8.1 Professional for professionals and businesses. Windows 8.1 Professional is available in both 32-bit and 64-bit versions and delivers high performance for both business and professional users. It is the upgraded version of the Windows 8 operating system and has been enhanced in many Rights to Windows 8.1 Pro for Windows 8 Pro Customers Organizations that acquired Windows 8 Pro through a volume license agreement are licensed for Windows 8.1 Pro even if their Software Assurance for the Windows desktop operating system expired prior to the releaseof Windows 8.1 Pro. I have Asus Zenbook with pre-installed Windows 8 (normal, not pro). I installed clean Windows 8.1 and couldn't get it activated. It asked license key, which I didn't knew. I was able to retrieve my licence key from BIOS (MSDM KEY) with WpKey util (pkeyui.exe). Windows 8.1 accepted this key and I was able to avoid all this "re-install Windows 8 swOL9j.