Bypass Admin password windows 7?

So I'm on a computer when I notice that Java isn't installed (weird) but when I try to install it it asks for the Admin password. I need Java for some of my stuff so I walked over an they thought it was weird that it wasn't installed to. So after I get home I realize that Java also needs to install a... show more So I'm on a computer when I notice that Java isn't installed (weird) but when I try to install it it asks for the Admin password. I need Java for some of my stuff so I walked over an they thought it was weird that it wasn't installed to. So after I get home I realize that Java also needs to install a little addon. I hate bugging people about passwords so I was wondering if there's a way to just bypass a password just this once.
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