The shared computers at our school (college equivalent?) were locked down in theory, that is, you had to get the IT guy to grant you internet access, otherwise you could only use things like Word and the like.
We found a workaround; if you opened up notepad, went to the open file dialog, then I forgot the next step but it would open up the file explorer, which turned into Internet Explorer if you entered a URL in the address bar.
Of course, we also had copies of Linux that booted off of CDs, but they were a bit too obvious.
I think there was something like this that allowed you to bypass the password on Win95 - you click help, then something, then it opens the file explorer
We found a workaround; if you opened up notepad, went to the open file dialog, then I forgot the next step but it would open up the file explorer, which turned into Internet Explorer if you entered a URL in the address bar.
Of course, we also had copies of Linux that booted off of CDs, but they were a bit too obvious.