When you take a proctored test, usually you do it in a web browser. In this case, simply follow a link sent by your university or test organizer.
For some exams, you may need to use the Examus desktop app instead of a browser. The testing organizer or your university should inform you before the exam if the Examus app needs to be used.
Here are detailed instructions for each of these testing types:
Note: check the instructions sent to you by test organizers for detailed information about the method of taking the test