che fine ha fatto l'utente "administrator" tanto caro a noi smanettoni?
di default è disabilitato sulla falsa riga di quello che succede nei sistemi unix con l'utente root.
per abilitarlo occorre seguire le seguenti istruzioni prese da un blog:

1. Logon as the account you created during the installation.
   
2. From the Start menu, go to "All Programs", "Accessories"
   
3. Right-click on "Command Prompt" and choose "Run as Administrator"
   
4. Click "Allow" from the ConsentUI prompt
   
5. In the resulting Command window, enter "regedit" and press enter
   
6. In regedit, browse to HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon
   
7. Add a new key at that level called SpecialAccounts
   
8. In the SpecialAccounts key, create a sub-key called UserList
   
9. At this point the path is: HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\SpecialAccounts\UserList
   
10. In the UserList key, create a new value of type DWORD (32 bit) called Administrator and set the value to 1.
    
11. From the command prompt enter: "net user Administrator /Active:yes"
    
12. Reboot, and now you can logon to the Administrator account

thanks jerry