Why not walk over to IT during your lunch break and explain the situation? They'll probably let you borrow their computers for a few minutes.
Or hell, in honesty, your boss probably isn't blocked either. Think of this as a great opportunity to have an informal "get to know you" with your boss for three minutes. Back when I worked at places like that, I never had a problem getting "unrestricted access" for things like that...
Or, even easier, why not just do it the old fashioned way?
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