Tails always starts from the same clean state and everything you do disappears automatically when you shut down Tails.

Without Tails, almost everything you do can leave traces on the computer:

• Websites that you visited, even in private mode
• Files that you opened, even if you deleted them
• Passwords, even if you use a password manager
• All the devices and Wi-Fi networks that you used

On the contrary, Tails never writes anything to the hard disk and only runs from the memory of the computer. The memory is entirely deleted when you shutdown Tails, erasing all possible traces.

Software is on 32GB  USB Drive.

You can use it Live or install it to multiple systems of your choice.

Works only on windows PC

You will need to understand how to boot your PC to the 32GB USB stick (ie: push F12 on a dell as pc is booting up in order to select which drive to boot to. Different Brands use a different process. Remember Google is your friend and can tell you which process to use for your PC.)