As with many aspects of Windows, there are some changes in Windows 8 you need to be familiar with if you want to add and manage user accounts.

If you cannot create or add new User Account in Windows 11/10 & Add someone else to this PC link is greyed out, not working or does nothing, then see this post.

Use Windows 7's built-in tools to manage multiple users on your PC and your network.

You can add the User Profile folder to Navigation Pane of File Explorer in Windows 11/10 using a Registry trick or Ultimate Windows Tweaker.