There are other links try some of them
Everything worked beautifully until the last step it is telling me the user name could not be found. So it wont take the new password.
You sure you have the correct user name? Really this should be asked in the win 10 Microsoft forums as they are the experts in this.
Incidentally the business files are they in the user documents folder or elsewhere on the PC? If the latter maybe look up making a new admin account. Again MS forums best choice.
Was it not shown here? Any admin accounts shown at all?
This may help: Windows 10 Forums
Once done you can clear the password from the Admin account and set a new one.
If that link doesn't help post in that thread on the Windows 10 Forums asking for help.
Don't worry - until 3rd party software is installed (McAfee) you are still protected by Windows Defender and Windows Firewall.
For normal users, UUkeys is a good go as it has a GUI and you only need a few clicks to reset the password. Here is a step by step guide: How to reset win 10 password
P.S No matter which program you are using, it is recommended to format the usb drive with FAT32, or there are boot errors on certain computers.
If it's a Microsoft account, you can reset the password via Microsoft password reset page.
For a local account, there are lots of softwares and recovery methods that can be of help:
Or remove the hard drive and connect it to a working PC as slave, backup your files and then do a clean reinstallation.
Thanks as this thread is 1 month old I have marked this as answered and locking the thread.