When you change a name of a user account, the original name is still tied to that account even though the new name is displayed in the Start menu and at log on. So you will not be able to use both names to rename another account with without deleting the other account that already has the name.
- If you have ever turned on the Guest account before changing the name, then the C:\Users\Guest folder will be the default folder name and cannot be changed again without a clean reinstall.
- If you change the default Guest account name before ever turning on the Guest account (OPTION ONE below), then the C:\Users\(renamed Guest) folder will be the default folder name and cannot be changed again without a clean reinstall.