borrowing software

The cost of new software applications can be prohibitively high. Suppose you need to do a project for class that requires the use of a software application you don’t own. Your roommate has a copy that her dad purchased for his own use at work, and she is willing to let you install it on your machine. Is it okay for you to borrow this software? Would it be okay if you uninstalled the application after you were finished using it? Would it be okay if the software was on the school’s network and you could copy it from there?