permission problem?

Tech-Archive recommends: Speed Up your PC by fixing your registry

From: js (js_at_someone@hotmail.com)
Date: 03/08/04 

Date: Mon, 8 Mar 2004 12:56:00 -0500

hi,
for security reason, I changed the "BUILTIN\Administrators" Server Access
from "Permit" to "Deny".
but the SQLSERVERAGENT was failed to start. got this error as follow(even I
chagne the service logon account to another window("power user" group's)
user).
Any ideas?
Thanks...

Error:

Event Type: Error
Event Source: SQLSERVERAGENT
Event Category: Service Control
Event ID: 103
Date: 08/03/2004
Time: 12:51:02 PM
User: N/A
Computer: LL_SERVER
Description:
SQLServerAgent could not be started (reason: Unable to connect to server
'(local)'; SQLServerAgent cannot start).

For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.