I think I have the magic recipe for you! You have to do this little workaround exercise in order to overcome the problem with user account renaming in Windows.

1. Log on as the local machine Administrator (or use any other account with Administrative rights)

2. Create a new account with the preferred name, e.g. Petros. If your existing account has the same name, you may want to rename it first to avoid the name clash. For example, Petros1 or PetrosOld.

3. Log out and log in again using the newly created username. You need to do this just to force Windows to create a local profile folder structure for this account.

3. Log out and log in as the local Administrator (or any other admin account as above)

4. Go to the User Profile settings. In Vista, you can find this in Control Panel > System > Advanced System Settings > Advanced (tab) > User Profiles (Settings button).

5. Select you old profile from the list and click the Copy To button. Now select the new profile you have just created. This will do the actual trick!

6. After Windows finishes copying the data – it may take a while – you can log out and log in as the new Petros in order to verify that everything works OK (application settings, desktop settings, etc.)

7. You can now safely delete you old account (Petros1 or PetrosOld) along with the old profile.

Hope this helps!

Ilias