Hi,
There are multiple ways to do this:
- Disable using device manager (recommended)
- Open device manager
- Find the keyboard
- Right Click on it
- Press Disable
- Open device manager
- Find the keyboard
- Right Click on it
- Press Enable
- Use a third party applicationDo this at your own risk
- Download the application from here
- You can lock keyboard and mouse in one click
- You can unlock the keyboard by press Ctrl + Alt + Del
I would not recommend editing the Policy Editor in this case, as it will harder to enable the keyboard again, but, if you want to here are the steps: Disable keyboard using Policy Editor
Cheers!