Intune app detection/uninstall

$appname = "Google Chrome"

$paths = @(
    'HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*',
    'HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*'
);

$tempPaths = @();
foreach ($path in $paths) {
    if (Test-Path -Path $path) {
        $tempPaths += $path;
    };
};
$paths = $tempPaths;

$app = Get-ItemProperty $paths | Where-Object DisplayName -eq $appname | Select-Object -first 1;

if ($null -ne $app) {
    Write-Output "Found $appname in installed software.";
    $app;
} else {
    Throw "$appname not found";
};

# End Detection
# Start Uninstall

if ($null -ne $app) {
    $app;
    Write-Host "Starting appname uninstall";

    $guid = $app.PSChildName.trim("{}");
    $hasGuid = $false;

    Try {
        [System.Guid]::Parse($guid);
        $hasGuid = $true;
    } Catch {
        Write-Host "Invalid GUID: $($app.PSChildName)";
        $hasGuid = $false;
    };

    if ($hasGuid) {
        Write-Host "Running command: msiexec /x $($app.PSChildName) /qn";
        $proc = Start-Process -FilePath msiexec -Wait -PassThru -ArgumentList "/x", $app.PSChildName, "/qn";
    } else {
        Write-Host "Found uninstall string";

        $uninstallString = $app.UninstallString.split('"')[1];
        $arguments = $app.UninstallString.split('"')[2].split(" ");
        $arguments += "--force-uninstall";
        $arguments = $arguments[1..($arguments.Length - 1)];

        Write-Host "Running command: $uninstallString $arguments";

        $proc = Start-Process -FilePath $uninstallString -Wait -PassThru -ArgumentList $arguments;
    };

    Write-Host "Uninstall exited with code: $($proc.ExitCode)";
};