Too SLOW! Need near an HOUR to deploy a Firefox on a Client? (Altiris)

HI,

I have a All-in-One Altiris Notification Server 7.1 (Virtual Machine) for PC inventory & software deployment with MSSQL database 2008 R2.

I try to deploy a Firefox 40.0 version to a Win 7 PC (64bit 4 GB RAM) (with Firefox silent installation mode (-ms)).

It's done at last, but it's needed around 40 minutes (16:35:05 to 17:20:24)  to finish the task! most of the time is keep "Running"

I run the same installation comand on the windows manuel only take 30 seconds to finish it!

What happened? I will provide the log for you detail, thanks!!!