How to change an SBS 2003 client PC from one SBS 2003 domain to a new SBS 2003 domain?

I am changing servers, from an old 'fragile' SBS 2003 server with NO space on the HDD to a new SBS 2003 server.
All client PC's are Dell's on XP Pro
I checked all client PC's local Administrator's password.
I tool the client PC's off the old domain and onto a workgroup (called workgroup), however after I reboot the Client PC I CANNOT LOGIN as Administrator....
The old server is still on the LAN network
The new Server is on a different patch panel and is on the internet.

I am 100% sure that the Local Administrators password is correct - It is the same as the old domain's administrators password.

Any ideas


How can I Logon to the computers?
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dbruntonConnect With a Mentor Commented:
You can use this to get into the local machine and reset the Administrator's password.
jesusrulesmeConnect With a Mentor Commented:
You will need to reset the local administrator password.  I've done this many times and thought for sure I knew the local administrator password, but I didn't.  There are a number of utilities to let you reset the password.  Go to this link:

It sounds like the PC does not have a local administrators Account. You could reset the admin  account password using one of the many utilities available on the web. Are you able to logon to any of the PC's with another account and re connect to the old domain to double check the local admin account.

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Admin_TechAuthor Commented:
Thanks I will have a look at resetting the Administrators account and download the app..
The rest of the client PC's are OK, just these two.
I rest the administrators account myself and was very careful.
One of the client PC's had Blackberry Desktop and the other had Windows Mobile sync.
Would these have caused anything?
Thanks  A_T
>> One of the client PC's had Blackberry Desktop and the other had Windows Mobile sync.
>> Would these have caused anything?

Shouldn't have.
Admin_TechAuthor Commented:
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