Retrieving Installed Software from all Servers in Forest Automatically


This PowerShell module I’ve developed to collect the software installed on all Windows servers within a forest. Requirements: PowerShell v2+, Remote Server Admin Tools (script uses AD cmdlets), & remote registry enable/permissions. Feel free to share this script but please provide credit if you do. Download the script here


It works by first getting a list of all Windows Servers in the AD forest then collecting registry entries from each of those servers and putting that into a table of data. It’s looking for the keys created by the Windows Installer/uninstaller (therefore this doesn’t list features/roles/standalone apps). It also can provide an error report which will tell you the severs that were successfully queried, failed to ping, or failed remote registry connection.

There are 2 functions in this module; Get-InstalledSoftware-Threaded & Get-InstalledSoftware.

By default these look for all Windows severs in the forest that the script is run in; you can limit the scope to a specific domain or to the name of severs matching your criteria. The threaded function allows parallel collection up to the thread limit (defaults to 1). So if you specify 50 threads and there 2000+ servers in the forest then 50 servers will be queued at the same time and as they finish new threads (powershell.exe instances) are generated until all severs are collected. When I tested it against 2000+ servers using 50 threads it ran in about 1.5Hrs with a server that had 2 cores and 8GB RAM. If you have a lot of server’s you want to get, use the threaded function. If you only have a few, use the regular function. Continue reading