Try this, when you get to the login screen, press the three keys CTRL+ALT+DELETE together twice. If you get a login user name box up then type administrator and leave the password box blank, then click OK.
'The system cannot log you in now because the domain YOUR D-65BBC6695 is not available'
Rosie, is this is an XP Professional PC? If it is, then at the username and password screen, is there a "Log on To" section at the bottom of that window? If there is then click the arrow, choose "This computer", then try to login again.
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