Yes, you'll need a Windows 8 license key to validate the install. It says something about SYSTEM SERVICE EXCEPTION. I download the Media Creation Tool from microsoft's website and when i run it i got an error with a sad face and pc is restarting. Once the media creation tool is finished, you can use the USB flash drive or DVD (after rebooting) to install Window 8.1. Use it to download the Official Windows 7/8.1/10 ISO file for burning it to a DVD later If you need to install/re-install/upgrade your Windows 7/8.1/10, you can use Media Creation Tool to create your own installation media using either a USB flash drive or a DVD, or just download a disc image (ISO file). So my brother sent me a windows 10 licence key and i am trying to upgrade to windows 10 from windows 8.1. Head to Microsoft's installation tool webpage, connect your USB flash drive (at least 4 GB of space should be available) or insert your writeable DVD, and then click the Create media button. In the new window, Select Troubleshoot -> Advanced options -> Command prompt. Go to Settings->Update & Security->Recovery->Advanced startup, click Restart now. Select 'Not Right Now' and proceed with the upgrade. On the Install Windows 10 page, click on 'Change on how Windows Setup downloads updates'. Extract the contents of the ISO to a folder and run the setup.exe ('Run as Administrator').

Fix There Was a Problem Resetting Your PC Issue Using Command Prompt. Download the ISO for Windows 10(21H1) using the Media Creation Tool. Save the ISO image to a USB drive for emergency reformatting and installations (we've all been there before) or just peace of mind. The solutions also work for Windows 8 and 8.1. The free tool downloads and creates the installation media you need to install Window 8.1 right away, without having to first install Windows 8 and then update to Windows 8.1, a lengthy process. It could come in handy if you ever want to reinstall Windows 8.1 or install it from scratch. Want to reinstall Windows 8.1 but don't have any installation media for it? Microsoft has released this new tool for you.

Windows 8.1 media creation tool error