Expand the Windows System folder from the menu. Select Run to open the dialog box. Type Slui 3 into the textbox. Click on the OK button or press Enter on the keyboard. Click Yes in the User Account Control window to allow Windows Activation. Type or copy & paste your product key in the Enter a product key window. If you’re installing Windows 10 for the first time, you’ll need to enter a valid Windows 10 product key or buy a full version of Windows 10 during setup, for this tool to work. If you’ve previously installed Windows 10 on your device, you should have a digital license and Windows 10 will automatically activate without entering a product key. If you need to install or reinstall Windows 8.1, you can use the tools on this page to create your own installation media using either a USB flash drive or a DVD. Windows 8.1 editions below are valid for both Windows 8.1 and Windows 8.1 Professional. Select an edition from the drop down menu Then, Boot your PC from the Installation Media you just created (change Boot Order in your BIOS) to begin installing Windows 10. If you have problems booting from a boot disc, you may have UEFI BIOS: Insert the Bootable Installation Media, then go into your BIOS and make the following changes: 1. Disable Secure Boot. I was wondering if that key would be accepted as a valid key for Windows 10 if I downloaded the ISO from Microsoft and tried to Stack Exchange Network Stack Exchange network consists of 183 Q&A communities including Stack Overflow , the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Show activity on this post. For OEM software license holders, it seems the solution is to install Windows 10 first (fresh or not) and bypass the key input screen. Once Windows 10 is installed goto Settings -> Update & Security -> Activation -> Change Product Key then you ender your OEM key and it should work. LWqwjMx. Click the “Update & Security” tile. You can also hit the "Windows Isn't Activated. Activate Windows Now" link at the bottom of the Settings app. Select “Activation” listed in the menu to the left. You should see a message on the right stating “Windows Can’t be Activated on Your Device" or something similar. The quickest way to find out your license type is by opening the Command Prompt in Windows 10 or 11, then entering slmgr.vbs /dlv.To bring up the Command Prompt, just click the Start button, type 1. Seems pretty obvious that the inactivated version of Win 10 left some mark on your BIOS, saying that a Win10 Product Key is needed. Try a fresh Win10 install using the new build. If it still doesn't work, then your previous Win10 install must have messed something up and you will have to reinstall Win8 first. If you need to install or reinstall Windows 8.1, you can use the tools on this page to create your own installation media using either a USB flash drive or a DVD. Windows 8.1 editions below are valid for both Windows 8.1 and Windows 8.1 Professional. Select an edition from the drop down menu If you want a clean install, use "Windows 8.1 Update 1" OEM installation media of SIMILAR EDITION as of your original Windows 8, it should accept your Windows 8 key retrieved from BIOS. If not, install using generic key for Windows 8.1 from Microsoft website, then activate later from Windows Settings (Online or By Phone). Here are generic keys for basic and Pro editions of Windows 8.1: Windows 8.1 standard/non-Pro edition: 334NH-RXG76-64THK-C7CKG-D3VPT. Windows 8.1 Pro: XHQ8N-C3MCJ-RQXB6-WCHYG-C9WKB. Windows 8 Pro with Media Center: GBFNG-2X3TC-8R27F-RMKYB-JK7QT.

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