Script to install Windows Updates, but do not restart

Question

I found this script that prompts for Y or N to install updates and again to reboot.
I would like it to go ahead install updates without asking, but NOT reboot.  We want to reboot the machines remotely and manually by putting their host names in a shutdown -i command.
So basically I want it to automatically assume "Y" for installing and "N" for rebooting.
See the script text below.  How does it need to be changed to do this?
# Script: WSUS.ps1
# Author: Gregory Strike
# Website: www.GregoryStrike.com
# Date: 02-19-2010
# Information: This script was adapated from the WUA_SearchDownloadInstall.vbs VBScript from Microsoft. It uses the
# Microsoft.Update.Session COM object to query a WSUS server, find applicable updates, and install them.
# WSUS.ps1 is a little less verbose about what it is doing when compared to the orginal VBScript. The
# lines exist in the code below to show the same information as the original but are just commented out.
# WSUS.ps1 can automatically install applicable updates by passing a Y to the script. The default
# behavior is to ask whether or not to install the new updates.
# Syntax: .\WSUS.ps1 [Install] [Reboot]
# Where [Install] is optional and can be "Y", "Yes", "No" or "N"
# Whether or not to install the updates automatically. If Null, the user will be prompted.
# Where [Reboot] is optional and can be "Y", "Yes", "No" or "N", This
# If updates require a reboot, whether or not to reboot automatically. If Null, the user will
# be prompted.
$UpdateSession = New-Object -Com Microsoft.Update.Session
$UpdateSearcher = $UpdateSession.CreateUpdateSearcher()
Write-Host("Searching for applicable updates...") -Fore Green
$SearchResult = $UpdateSearcher.Search("IsInstalled=0 and Type='Software'")
Write-Host("")
Write-Host("List of applicable items on the machine:") -Fore Green
For ($X = 0; $X -lt $SearchResult.Updates.Count; $X++){
$Update = $SearchResult.Updates.Item($X)
Write-Host( ($X + 1).ToString() + "> " + $Update.Title)
If ($SearchResult.Updates.Count -eq 0) {
Write-Host("There are no applicable updates.")
Exit
#Write-Host("")
#Write-Host("Creating collection of updates to download:") -Fore Green
$UpdatesToDownload = New-Object -Com Microsoft.Update.UpdateColl
For ($X = 0; $X -lt $SearchResult.Updates.Count; $X++){
$Update = $SearchResult.Updates.Item($X)
#Write-Host( ($X + 1).ToString() + "> Adding: " + $Update.Title)
$Null = $UpdatesToDownload.Add($Update)
Write-Host("")
Write-Host("Downloading Updates...") -Fore Green
$Downloader = $UpdateSession.CreateUpdateDownloader()
$Downloader.Updates = $UpdatesToDownload
$Null = $Downloader.Download()
#Write-Host("")
#Write-Host("List of Downloaded Updates...") -Fore Green
$UpdatesToInstall = New-Object -Com Microsoft.Update.UpdateColl
For ($X = 0; $X -lt $SearchResult.Updates.Count; $X++){
$Update = $SearchResult.Updates.Item($X)
If ($Update.IsDownloaded) {
#Write-Host( ($X + 1).ToString() + "> " + $Update.Title)
$Null = $UpdatesToInstall.Add($Update)
$Install = [System.String]$Args[0]
$Reboot = [System.String]$Args[1]
If (!$Install){
$Install = Read-Host("Would you like to install these updates now? (Y/N)")
If ($Install.ToUpper() -eq "Y" -or $Install.ToUpper() -eq "YES"){
Write-Host("")
Write-Host("Installing Updates...") -Fore Green
$Installer = $UpdateSession.CreateUpdateInstaller()
$Installer.Updates = $UpdatesToInstall
$InstallationResult = $Installer.Install()
Write-Host("")
Write-Host("List of Updates Installed with Results:") -Fore Green
For ($X = 0; $X -lt $UpdatesToInstall.Count; $X++){
Write-Host($UpdatesToInstall.Item($X).Title + ": " + $InstallationResult.GetUpdateResult($X).ResultCode)
Write-Host("")
Write-Host("Installation Result: " + $InstallationResult.ResultCode)
Write-Host(" Reboot Required: " + $InstallationResult.RebootRequired)
If ($InstallationResult.RebootRequire -eq $True){
If (!$Reboot){
$Reboot = Read-Host("Would you like to install these updates now? (Y/N)")
If ($Reboot.ToUpper() -eq "Y" -or $Reboot.ToUpper() -eq "YES"){
Write-Host("")
Write-Host("Rebooting...") -Fore Green
(Get-WMIObject -Class Win32_OperatingSystem).Reboot()

Answer 1

You could try  reading the instructions posted with the script.  It might be helpful to you.
¯\_(ツ)_/¯