Installed Software

This guide should get you there:
https://devblogs.microsoft.com/scripting/use-powershell-to-quickly-find-installed-software/

Thank you Andrew Porter but this is not what I was hoping for.

I have this PowerShell provided by oBdA that works on the server you are logged on to and gives ALL software but I need it to allow me to select the software I want, i.e. firefox, then search for it on all the computers in my AD, skipping the Linux ones.  
I would also like to be able to select the OU to run on and provide the same results.

Please help:

'', '\Wow6432Node' | ForEach-Object {    Get-ItemProperty -Path "HKLM:\Software$($_)\Microsoft\Windows\CurrentVersion\Uninstall\*" |     Where-Object {$_.DisplayName -and ($_.SystemComponent -ne 1) -and ($_.UninstallString)} |    Select-Object -Property DisplayName, DisplayVersion, Publisher, InstallDate, @{n='Architecture'; e={If ($_.PSParentPath -like '*\Wow6432Node\*') {'32bit'} Else {'64bit'}}} } | Sort-Object -Property Publisher, DisplayName |    Format-Table -AutoSize | Out-String | Out-File "C:\Users\rgtur\Desktop\Common Applications\Software Inventory.txt" 

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Hi Bill, do you have SCCM / MECM to manage your workstations?  If so, you could utilise the SMS_InstalledSoftware WMI class.  Otherwise, using the Win32_Product class can be slow.
It can also be done via remote registry, similar to oBdA's code
https://bobcares.com/blog/powershell-list-installed-software/
For a single machine using the SMS_InstalledSoftware class, here's what I use

[CmdletBinding()]
Param(
  [Parameter(Mandatory=$False)]
    [string]$ComputerName,
    [string]$AppName
)
If (!$ComputerName) {
    $ComputerName = Read-Host -Prompt "Computername (type localhost or . for the local computer)"
}
If (!$AppName) {
    $AppName = Read-Host -Prompt "Application Name (partial match - enter * for all)"
}
If ($AppName -eq '*') {$AppName = ''}
Get-WmiObject -ComputerName $ComputerName -Namespace 'root\cimv2\sms' -Class SMS_InstalledSoftware | Where {$_.ARPDisplayName -like "*$AppName*"} | Select ARPDisplayName, ProductName, ProductVersion, InstallDate, SoftwareCode, UninstallString

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Copy that code into the PowerShell ISE, and hit F5 to run it.

Rob.

Hi Rob,
This is good *and slow like you said* but I have over 2,000 boxes to search through.  Any chance you can edit it for that?

Thanks

THIS IS GREAT ROB!!  Thank you so much!!!!!!!!!!!!!!!!!!

No problem. Glad it's useful for you.

Rob.