Installation on Work Computer

I am in an online Virtual School, my tests require ExamGuard. My private computer started to run slower so I decided to clean the computer and use a backup of an older version. The next morning the computer started to update Windows 7 and my computer would no longer log in. My mother then got a computer from her job but i cannot download ExamGuard because I do not have administrative priviledges. Is there anyway I can get past the administration and take my tests with ExamGuard?