At my work they were throwing away computers so I saved a Dell laptop from the dumpster. I just have the computer and the charger.
It's pretty beat up, but works fine. On it is Ubuntu 16.04 LTS. The previous user (probably my boss) didn't give me his password, and I'd probably prefer to delete his data anyways, but at the moment I can only login with a guest account.
I would like to reset the system from the guest account, or know what I can do to use the computer as the new user. I would prefer not to bother my boss because he might be worried that I would access his information.