Why can't I log into my new (used) computer?

Walter bought a used computer, but now it won't take the administrator password. Leo says that the best thing to do is wipe the hard drive, install a fresh copy of Windows, and start over. There's likely some stuff on there Walter won't want. You can use Windows free for ten months, and it's really only $99.

If you don't want to pay for your OS, put Linux on it. Leo recommends Ubuntu or Manjaro.