Notes: CAN'T upgrade from Home system to Pro system, You should download the windows 10 pro system here first , after you installed it, then to activate the code:

In order to install the software on your PC follow the instruction here.

How to activate:

1. Please download and install correct edition of windows 10.

2. Go to 'Control Panel-All Control Panel Items-System ' and click 'Activate Windows' or 'Change Product Key'.

3. Click 'Activation' and enter the key you bought. Now your windows has been activated.

Description of Windows 10 Professional KEY

You're already an expert with the familiar Start menu, task bar, and desktop. Live tiles provide streaming updates of what matters most, instantly.

Windows 10 is designed to be compatible with the hardware, software, and peripherals you already own. And always-enabled updates help you stay current on features and security for the supported lifetime of your device.

Windows 10 gives you absolutely the best experience for doing what you do. Stay focused with easy ways to snap apps in place and optimize your screen space for getting things done. See your open tasks in a single view and create virtual desktops to gain space or group things by project, like Office apps for work and games for play.

Gaming just got even better with Windows 10. Not only do your existing games work great, but now you can play and connect with gamers across Xbox One and Windows 10 devices. From the best casual games to a new generation of PC gaming, Windows 10 is built for games you love.

Some users may afraid of uncustomed operation on Windows 10, but the fact is that it is a really easy and convenient experience with it. You will find it is quick to be familiar with and you can not live without it after a long-time using. No more to say, start a comfortable system from now!