Lists all installed software, including any that is not visible with PowerShell

add-remove.psm1

function Get-Installed {
    [CmdletBinding()]
    param (
        # The name of the software
        [Parameter(Mandatory = $true)]
        [string] $Name
    )
    
    begin {
        $PATHS = @(
            "HKLM:\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall",
            "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall"
        )

    }
    
    process {
        $installed = $null
        ForEach ($path in $PATHS) {
            $installed += Get-ChildItem -Path $path |
            ForEach-Object { Get-ItemProperty $_.PSPath } |
            Where-Object { $null -ne $_.DisplayName -and $_.DisplayName.Contains($Name) } |
            Select-Object DisplayName, DisplayVersion, PSChildName |
            Sort-Object -Property DisplayName
        }
        $installed
    }
    
    end {
        
    }
}

function Remove-Installed {
    [CmdletBinding()]
    param (
        [Parameter(Mandatory = $true, ValueFromPipeline = $true)]
        $Guid
    )
    
    process {
        Write-Verbose "Removing $Guid"
        $a = "/x " + $Guid
        Start-Process msiexec -Wait -ArgumentList $a
    }
    
}

# Examples
#
# Get ALL software containing (case-SENSITIVE) .NET
# Get-Installed -Name .NET  
# 
# Get ALL software containing (case-SENSITIVE) .NET AND 3.1.10
# Get-Installed -Name .NET | Where-Object {$_.DisplayName.Contains("3.1.10")} 
#
# Get ALL software containing (case-SENSITIVE) .NET AND 3.1.10 AND Remove that software
# Get-Installed -Name .NET | Where-Object {$_.DisplayName.Contains("3.1.10")} | Select -Expand PsChildName | Remove-Installed
#