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Laptop cannot log back into domain immediately after account has been created

I'm trying to set up a laptop (running XP Pro) to a Small Business Server 2003 domain, using the 'ConnectComputer' wizard.  However, although the wizard runs just fine, reboots the client etc., installs the Outlook mailbox and maps the network drives, the next time I log in, I get 'The trust relationship between this workstation and the domain has failed', even though I only created the computer account 5 minutes ago!

I've gone into Server management, found the computer account, right-clicked on it and selected 'Reset computer account', but that didn't fix anything.  This has happened to 2 of my users - the workaround at the moment is that they unplug from the network, disable their wireless, and log on using cached credentials before re-connecting.  It's been like this for over a week now (so it should definitely have re-synced by now), but for some reason it keeps failing.  Any ideas?
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Brian Pierce
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Have the machines been imaged without using SYSPREP?
If so then multiple machines will have he same SID and this is causing the problems. You need to take the machine off the domain, run NewSID http://technet.microsoft.com/en-us/sysinternals/bb897418.aspx and then join them back to the domain again.
Try resetting the secure channel (http://support.microsoft.com/kb/810497) - or reinstall with a different station name.
You could also try removing the computer from the domain, resetting the security (http://support.microsoft.com/kb/313222) then reboot, and join it back again into the doamin.
I can't spell - "domain".

Otherwise - do you get any other errors in the station event log - or on the server?
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Techdivision

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Well, I am getting this error turning up repeatedly:
The session setup from the computer BLANCHETT01 failed to authenticate. The name(s) of the account(s) referenced in the security database is BLANCHETT01$.  The following error occurred:
Access is denied.
Comes up about every 4 hours.
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and235100
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Excellent - thank you, that did the job.  I had two machines in there with the same computer name, which SBS had confused with each other.  Funnily enough, I thought that all machines had different SID's, so that the hostnames wouldn't get confused.  Must be something to do with the wizard.  Thanks for your help.