SCCM client initialization before "Install Updates"

Hi everybody,

I'm currently facing an annoying issue during OSD.

I would like to install updates during OSD. However this step fails and I think I've found the reason : SCCM client is not fully initialized at the end of "Setup Windows And ConfigMgr" step.

I run the following steps :

1. Setup Windows And ConfigMgr
2. Perform a Hardware Inventory (In order to put the computer in the software update collection)
3. Wait for 3 minutes (for Hardware inventory to finish)
4. Perform a "Scan updates" 
5. Wait for 5 minutes (for "Scan Updates" to finish)
6. Perfom a "install Mandatiry Updates"

The issue occurs at step 2 : as SCCM client is not initialized, hardware inventory is not possible. It isn't possible to run the following command : WMIC /namespace:\\root\ccm path sms_client CALL TriggerSchedule "{00000000-0000-0000-0000-000000000001}" /NOINTERACTIVE. this is due to the fact that inventory component is not ready.

For addtitional information, at the end of task sequence and after the computer rebooted, SCCM client is still downloading policies.

so my question is : is it possible to add a step just after "Setup Windows and ConfigMgr" to ensure that SCCM client is fully operational before going on ?

Regards,

Régis