Installing Itunes on your Windows 10 PC is really a simple process. Basically you download the software from Apple then run it on your computer. Once its install just add your apple account or create a new one. Then you can start backup and restoring your Iphone and Ipads as needed. watch video below.
You can also boot the device into DFU mode that restore firmware or even downgrade the firmware.
More on DFU Mode in the next couple lessons