Installed Software Powershell

First the easy ways, but it might give all of the installed software.

Get-WmiObject -Class Win32_Product | Select-Object Name, Version, Vendor, InstallDate,IdentifyingNumber |Format-Table -AutoSize

Get-WmiObject Win32Reg_AddRemovePrograms | Select-Object DisplayName, Version, Publisher, InstallDate |Format-Table -AutoSize

Now we turn to the registry where installed software information is stored but in parts in various locations. hence we need to look at 3 locations to get the complete picture.

HKCU:\Software\Microsoft\Windows\CurrentVersion\Uninstall\ HKLM:\SOFTWARE\Wow6432node\Microsoft\Windows\CurrentVersion\Uninstall\
HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\ 

Below mentioned are Powershell commands to retrieve installed software. Please run one at a time:

Get-ItemProperty -Path 'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\*'| Select-Object DisplayName, DisplayVersion, Publisher, InstallDate |Format-Table -AutoSize 
Get-ItemProperty "HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*" | Select-Object DisplayName, DisplayVersion, Publisher, InstallDate |Format-Table -AutoSize
Get-ItemProperty "HKCU:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*" | Select-Object DisplayName, DisplayVersion, Publisher, InstallDate |Format-Table -AutoSize