It may be worth considering Eddie that there may be private or sensitive info on that machine if it has not been "cleaned" up prior to disposal. Perhaps you should be reinstalling and reformatting windows from scratch.
//The right way is simply not to try. Get a Windows install disk – perhaps one even came with the machine – and reformat and reinstall Windows from scratch. It’s the “right” way for two reasons:
You’re not even going to try to access or recover the previous owner’s data. More importantly, you’re not going to suffer from any infections or malware left behind by the previous owner.
That person didn’t know enough to securely erase their data, so what faith do you have that the machine isn’t loaded with viruses and malware? Reformat and reinstall really is the right thing to do.
People are curious or “adventuresome” (perhaps a synonym for foolhardy?) and want to run or see what’s on the existing hard disk – perhaps (hopefully) before they reformat and reinstall.
Fair enough. As it turns out, it’s very easy to gain access by downloading a password reset tool, burning it to CD, and booting from that CD.//
https://askleo.com/how_do_i_gain_administrative_access_to_a_secondhand_computer/