Go to 'System' - 'About' and 'Change product key' (Click 'Yes', if User Account Control comes up)Ĥ. In that case it is necessary to perform a clean installation (see Option 1).ģ. If those two points apply to you, it is obvious that some important system files are missing. If error code '0x800f0805' appears after applying the default product key, please make sure that you have at least 20 GB of free disc space and that Windows is updated to it's latest version. If it's not accepted, apply the default product key: 'VK7JG-NPHTM-C97JM-9MPGT-3V66T'

Press the 'Windows key' + 'R', type 'slui.exe' and hit 'Enter'Ģ. Please proceed with this when you are currently using Windows 10 Home and want to upgrade to Proġ. Option 2: Upgrading from Windows 10 Home to Pro

Remove all partitions and create a new one to install Windows.

Installation type: Custom: Install Windows only (advanced).

Select your language, time, and keyboard preferences.

Boot from the USB flash drive or the DVD you have created.

Select the media you want to create (USB flash drive or ISO file to create a DVD).

Select Edition: Windows 10 (it includes both, Pro and Home).

Create installation media for another PC.

Download Windows Media Creation tool directly from Microsoft: Please proceed with this when you are currently using an older Windows version than Windows 10 or a PC without an operating systemġ. Option 1: Performing a clean installation

Windows 10 Pro: How to download, install and activate

Download windows 10 pro 64 bit iso