How can I change my username completely?

I have a new refurbished Dell Precession T1700 tower with Windows 7 that came with a use name = user and it does is not set up with a password. File Explorer shows folders for two users: Users/User and Users Public. The PC automatically logged me in to Users at start up. I want to rename the User to stan to match other computers in my work-group and add a password. (I have been told computers must have the same user and workgroup names.)

I found two web pages that explain how to make the change requiring the registry. I am cautious with the registry, and these explanations seem slightly different from one another.

https://support.microsoft.com/en-us/kb/2454362

Changing User Name in windows 7 - Microsoft Community

What is the best way?


Should I change, like this:
1 Create a new user = Administrator with administrator privliges
2 HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\profilelist\
3 [Rename user -->stan in registry]
4 [Then rename folder User -->stan] ?

You can do the registry edit, as the link says or you could create a new administrator account under whatever name you want. There would be a users/newusername folder there then.