Sounds like the secure channel passwords between the domain and the Vista client have got out of sync. How long was the laptop 'away' from the domain for?? If I remember correctly the 2 get out of sync if the laptop has not logged into the domain for 30 days.
Either way there are 2 ways to fix it, drop the machine out of the domain and add it back in or use netdom.exe to reset the secure channel.
This;
Netdom.exe
For each member, there is a discrete communication channel (the security channel) with a domain controller. The security channel is used by the Netlogon service on the member and on the domain controller to communicate. Netdom makes it possible to reset the security channel of the member. You can reset the member security channel by using the following command:
netdom reset 'machinename' /domain:'domainname
where 'machinename' = the local computer name and 'domainname' = the domain where the computer/machine account is stored.
Suppose you have a domain member named DOMAINMEMBER in a domain called MYDOMAIN. You can reset the member security channel by using the following command:
netdom reset domainmember /domain:mydomain
You can run this command on the member DOMAINMEMBER or on any other member or domain controller of the domain, provided that you are logged on with an account that has administrator access to DOMAINMEMBER.
From here;
Paul
MCSE 2003
MCSA 2003
MCITP Enterprise Administrator
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Scott Adams