This post will show you how to change System Information in Windows 10/8/7 using free software like Ultimate Windows Tweaker, Windows Info Box Editable, and Windows OEM Info Editor.
Change System Information in Windows 10
1] Ultimate Windows Tweaker
You can use our freeware Ultimate Windows Tweaker. You will see the setting under the Additional tweaks tab. Click on Edit OEM information to get started.
2] Windows Info Box Editable
This free tool lets you change or edit the System Information easily.
Once you have downloaded this portable app, run its .exe file. To start editing the information, hit Enter. In the box which opens, type the information you want to be changed. Click OK to change the next parameter.
This app lets you change Windows edition, processor name, RAM, System Type, Computer name, full computer name, full description, and Workgroup.
Do note that I have not tried it, but you can download it from here. (UPDATE: Please read comments first)
3] Windows OEM Info Editor
You can also download Windows OEM Info Editor. It also allows you to change OEM information like Manufacturer, Model, etc.
Also read: Add or Change OEM Information in Windows by modifying the Registry.