Monitoring all installed applicationsoftwares on workstation

[trungleviet]

Dear all,
In my company, domain users had Admin Local Administrator permission with their workstations. Thereforce, they can install all software what they needed.
And I would like to find out how to monitor all installed applications softwares on user workstations. I am using NagiosXi
Could you please advice me?

Many thanks for your supports,

Trung Le Viet