This is one of those tasks that seems simple but is notoriously tricky. Unlike changing your account name in Settings, renaming the C:\Users\YourName folder requires specific steps to avoid breaking your apps, desktop paths, and system settings. Why is this so difficult? Windows ties thousands of registry entries, environment variables, and app permissions to the absolute path of your user profile folder. Simply renaming it in File Explorer will result in a "Folder in Use" error, and even if forced, will cause "Access Denied" errors or a temporary profile at next login.
Never rename the folder without updating the registry. And always, always have a backup. Changing a user folder name in Windows is not a casual operation—but with these steps, it’s entirely doable. how to change windows user folder name