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@ishu3101
Created September 26, 2022 23:24
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Get the List of Installed Program via Registry using Powershell
Function Get-InstalledPrograms {
<#
.Synopsis
Fetches the list of installed software on a system via the Windows Registry.
.Description
Returns a list of software installed on a system determined from installations that have
registered themselves in the Windows Registry. This cmdlet will parse both the native key
and the WOW64 key if it exists to ensure a complete list of software installs is returned.
.Notes
This cmdlet is particularly useful on Server Core installations where the Programs and
Features Control Panel applet isn't available and no equivalent cmdlet functionality exists.
#>
$ErrorActionPreference = 'Stop'
# Define the key registry paths we'll retrieve installs from
$NativeRegPath = 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*'
$Wow6432RegPath = 'HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*'
# Get the list of installed programs including WOW64 if present
$UninstKeys = Get-ItemProperty $NativeRegPath
if (Test-Path $Wow6432RegPath -PathType Container) {
$UninstKeys += Get-ItemProperty $Wow6432RegPath
}
# Parse all returned installs and add them to an array
$InstProgs = @()
foreach ($Prog in $UninstKeys) {
# If the entry has no defined DisplayName ignore it as it's probably not useful
if ($Prog.DisplayName -ne $null) {
$ProgInfo = [PsCustomObject]@{
Name = $Prog.DisplayName
Publisher = $Prog.Publisher
InstalledOn = $Prog.InstallDate
Size = $Prog.EstimatedSize
Version = $Prog.DisplayVersion
Location = $Prog.InstallLocation
Uninstall = $Prog.UninstallString
}
$ProgInfo.PSTypeNames.Add('PSWinGlue.Programs')
$InstProgs += $ProgInfo
}
}
return $InstProgs
}
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