Windows 7 can not load Group Policy after Ghost Imaging

Hello,

I have approx 20 Dell Netbooks. I have created an image of one of them running windows 7 pro after a sysprep. All 20 now have this image on them. Now I am unable to use the builtin user account, and had to enable the builtin administrator account to access the computer. When logging in as administrator I receive the following 'ballon' error:

Failed to connect to a Windows Service
Windows could not connect to the System Event
Notification Service service. The problem prevents
standard users from logging on to the system.
As an administrative user, you can review the System
Event Log for details about why the service didn't
respond

However, I can not access the event log, control panel, and many other aspects. When trying I recieve this error:

The server process could not be started because the configured identity is incorrect. Check the username and password.

Now I would assume that the user that some of the services are running as no longer have access to the local machine after the sysprep. Would anyone know if I am on the right track, and if so which service would that be?

Also, the original computer was part of a domain and then syspreped.

Thanks for any help!