Script writing a note to player save on their desktops

I’m currently making a horror game which force exits your game bringing you to your desktop.
And I’m trying to figure out a way to get a script to write and save a note to the players desktop, which the player can then open.

Although this is possible with running the game as an administrator, take a look at:

I believe the command is like, File.WriteAllText

Edit:

Writing to a desktop I believe requires administration privileges.