To back up your computer, you can use Clone Disk Wizard of MiniTool Partition Wizard.
To avoid deleting a vital part of the UI and making a mess of your computer, you should make a backup of your computer before you beautify Windows 10 to get yourself a better browsing experience. However, these Windows 10 customization tools will modify system files.
To customize your computer better, you may need to use some Windows 10 tweakers. If you don't want to endure your computer's default appearance and behavior anymore, you should read this post and start to customize Windows 10. However, after a long time of use, have you ever been dissatisfied with the relatively fixed appearance and the behavior of computer for a moment? In a word, you do everything on your computer.
You may spend a lot of time on your computer, playing games, working, watching movie, listening music, etc.