sam account service problem in 2003 pdc

[sx3]

Can anyone resolve the following:
I built a 2003 domain server and to resolve an initial problem I changed the settings in "admin tools\services\Security accounts manager" for the "log on as" from local system account to the administrator. This has resulted in the performance of the server \ unable to start various services amongst other things.

Is there a way to regress or change the log on as back to system account? I tried the normal way by just changing it through admin tools \ services but it just hangs. It also takes several hours to reboot and log on.

Any help will be appreciated.

Thanks

 

[asktheman]

try login on locally to change the sam service account.

 

[asktheman]

Is a rebuild an option?