Google "utilman.exe trick" to boot any W8.x to W10 USB or DVD media to create a new login.
Google "Microsoft Media Creation Kit to make W10 USB or DVD media." You don't need W8 for the Utilman.exe trick.
Sorry but I do not know of a no money way. You must have the blank DVD or USB stick. Cheaper than a service counter or ordering factory recovery media. Once you get back in you MUST backup the HDD since if the OS fails, you can't fix it for free as today I can't find Dell's W8 restore media for free downloads.
Plan ahead. Save big bucks.
I was given a Dell laptop with touchscreen feature. The person who gave it to me is a child who got a new one for Christmas and he discarded it. Thing is. He added a password which he has forgotten. He also doesn't use that email anymore. His mother never touched it so knows nothing. I am a college student and it would be so awesome if I didn't have to spend my housing money on a laptop. Please, help.