If you find yourself in a situation where you need to reload Windows and start fresh, as if the computer just came out of the box, this method will allow you to do so: If you're able to boot to a Windows login screen, or the desktop, follow these steps: 

To perform a Partition Restore, you'll need to first enter the Windows repair mode.

1. While on the Windows desktop or login screen, hold down the right shift key on the keyboard, then click the Start button. Select the shutdown option, and click "Restart" while still holding the Shift key. You can release it once the screen goes blank.
2. Click "Troubleshoot"
3. Click "Reset this PC"
4. Click "Remove Everything"
5. Click "Only the drive where Windows is installed" (This is VERY important!!!)
6. Click "Just remove my files"
7. Finally, click the "Reset" button

If you're not able to reach the Windows login screen, you can use this method:

1. Power down the computer completely, then turn it back on
2. Once you see the initial Windows logo (Four squares with a spinning circle of dots at the bottom) Power down the pc entirely again. (Pulling the power cable will be the quickest way.)
3. Repeat steps 1 & 2, and when you power on the PC again, you should see the same Windows screen with "Preparing automatic repair" at the bottom.
4. Wait until you see the blue screen with two buttons, and click "Advanced Options"
5. Click "Troubleshoot"
6. Click "Reset this PC"
7. Click "Remove Everything"
8. Click "Only the drive where Windows is installed" (This is VERY important!!!)
9. Click "Just remove my files"
10. Finally, click the "Reset" button

This process will take somewhere between 30 to 45 minutes, and once completed, it will land you on the initial setup screen for Windows.

If you're not able to boot to Windows screens at all, the USB restore method will allow you to reinstall Windows.

Windows 10 Download Tool:
https://www.microsoft.com/en-us/software-download/windows10

This will will automatically create a Windows 10 reinstallation USB drive (at least 8GB blank USB drive is required). You can then reinstall Windows by booting from the USB drive by repeatedly pressing F12 and selecting the USB drive as the boot devices. From there, it will guide you through the reinstallation process. In some cases, you may have to change your bootup mode from Legacy to UEFI in your BIOS settings.