Permission denied in file trying to import
You've just run into a peculiarity of psql on Windows.  

In my comment I just wanted to exclude the possibility that you really didn't have the necessary permission.  Then it turned out that even on Windows, you have to use 'normal' slashes instead of backslashes, that is:

\i 'C:/Users/Work/Desktop/School Work/load_database.sql'


should work fine regardless which folder you start psql from.  Notice that I used single quotes - with double quotes you'd got

"C:/Users/Work/Desktop/School Work/load_database.sql": Invalid argument