Automatic update not working

I have set up AU through GP. Not using WSUS (yet). WindowsUpdate.log used to
stop here: "Update is not allowed to download due to regulation.", but after
validating the workstation it says: "WARNING: AU found no suitable session to
launch client in".

I thought security updates would work using AU. Now I see no other solution
but to validate every workstation and update manually. What can I do to
automate the process. Or is there something wrong with my GP settings.

Will updating work better with WSUS (can't do that yet, though)?

GP:
Do not display 'Install Updates and Shut Down' option in Shut Down Windows
dialog box Enabled
Do not adjust default option to 'Install Updates and Shut Down' in Shut Down
Windows dialog box Not configured
Configure Automatic Updates Enabled
Specify intranet Microsoft update service location Not configured
Enable client-side targeting Not configured
Reschedule Automatic Updates scheduled installations Enabled
No auto-restart for scheduled Automatic Updates installations Enabled
Automatic Updates detection frequency Not configured
Allow Automatic Updates immediate installation Enabled
Delay Restart for scheduled installations Not configured
Re-prompt for restart with scheduled installations Enabled
Allow non-administrators to receive update notifications Not configured


Antti