He lost me from the start.
Windows assigns folders for each user.
To rename the folder that has the user's name is a security and logical problem.
{begin sarcasm}
Imagine three user on a computer, Alice, Bib can Carl.
Alice wants to change her name to Carl, but still have her folder named Alice.
So Carl must change his name, put still have his folder.
Unable to resolve this they ask Bob.
Bob does not want to help!
What is the scrip that can handle that?
{end sarcasm}