Enterprise Single Sign-On service hanging at startup

Hey everyone, I have run into an interesting problem which I can’t find
a solution for. I am able to reproduce this problem on multiple
machines. A little background, all the machines this is occurring on
are running Windows XP with Service Pack 2. They are developer
workstations.

To the problem…
After I get BizTalk Server 2004 installed, every time the computer
reboots, it gets to the graphical part of the Windows login, but before
the login box pops up, the box that says \”Applying local settings\”
comes up, and it sits there for about 4 minutes. After that time has
elapsed, the login box comes up and I am able to login. Checking my
event log, I see this:

Event Type: Error
Event Source: Service Control Manager
Event Category: None
Event ID: 7022
Date: 1/10/2006
Time: 2:02:06 PM
User: N/A
Computer: XXXXX
Description:
The Enterprise Single Sign-On Service service hung on starting.

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

and immediately after that entry I see this:
Event Type: Error
Event Source: Service Control Manager
Event Category: None
Event ID: 7001
Date: 1/10/2006
Time: 2:02:06 PM
User: N/A
Computer: XXXXX
Description:
The BizTalk Service BizTalk Group : BizTalkServerApplication service
depends on the Enterprise Single Sign-On Service service which failed
to start because of the following error:
After starting, the service hung in a start-pending state.

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

I’ve tried searching the internet, but the only things I have found on
it say to apply fixes and BizTalk Service Pack 1. All of these
machines are up to date. After I get logged in, BizTalk and the
Enterprise Single Sign-On services are running. I’ve noticed that if I
unplug my computer from the network and reboot, the login screen comes
up right away.

Anyone have any insight on what might be causing this problem?

Thanks,
Bob