How do I rename this Folder?

Maguscreed said:

As I said before so far as I know it's locked to prevent installed programs from breaking when the folder is renamed. Your best option is to create a new account with the name you wanted, and simply delete that one once you are done.

I don't want to make a new account because I don't want to re install EVERYTHING!

ANYTIME you change your username, that is, your login name, you should also change the corresponding folder name. HOWEVER, you cannot do this manually without risk. Here is the simple way to do it.

1. Create a new user with the name you want to start using.
2. Either create another new (admin) user temporarily, or enable to built in Administrator account temporarily and log in with that account.
3. Use Windows Easy Transfer to move everything from the old user to the new user. In the process, when it asks about the old and new computer, you'll use the same computer for both. The old account will be the "old computer" and the new account will be the "new computer."
4. Log in as your new user, verify everything works, delete the temporary account, the old account, and disable the built-in Administrator.
5. Done.