Is it not because of the number of the accounts, but because I make a sysprep 2004 image, with a pre-configured account ("User"), and I want a script which delete the account created during OOBE; I don't know which name will be inserted, so I thinked for a script which delete everything except the built-in accounts (Administrator, ssh, etc…) and "User" account. The script it's not an example, I tested it, and it works, but it wipe also the "User" account, so at the next boot I can't do anything (the Lockscreen ask for a nonexistent password for "User")