<#
Author: Craig Krautkramer
Date: 07/10/22

.Synopsis
Script uninstalls the Arcserve UDP Agent software.  If the backup server software (Console or
Recovery Point Server) is detected, the script will exit.

#>
$App_Name = 'Arcserve UDP Agent'

######################
###   Functions    ###
######################
Function Get-Software ($CPU = $ENV:PROCESSOR_ARCHITECTURE) {
	if ($CPU -eq 'AMD64') { 
		$32bit = Get-ItemProperty HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\* 
		$64bit = Get-ItemProperty HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*
		$32bit + $64bit
	} 
	else { 
		Get-ItemProperty HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\* 
	}  
}

Function Check-ExitCode {
	If ($ExitCode -eq 0) {
		Write-Host `n
		$a = Get-Software | Where-Object { $_.DisplayName -eq $App_Name } | Select DisplayName, DisplayVersion | FL
		If ($a -ne $null) {
			Write-Host "ERROR: Script reports successful uninstall, but $App_Name still shows in Programs and Features"
			$a
		}
		Else {
			Write-Host "$App_Name Successfully Uninstalled."
		}
	}
	ElseIf ($ExitCode -eq 3010) {
		Write-Host `n
		
		$a = Get-Software | Where-Object { $_.DisplayName -eq $App_Name } | Select DisplayName, DisplayVersion | FL
		If ($a -ne $null) {
			Write-Host "ERROR: Script reports successful uninstall, but $App_Name still shows in Programs and Features"
			$a
		}
		Else {
			Write-Host "$App_Name Successfully Uninstalled, but requires a reboot to complete."
		}
	}
	Else {
		Write-Host `n
		Write-Host "ERROR: $App_Name failed to uninstall.  Exit Code:" + $ExitCode
	}
}

######################
###  Script start  ###
######################
$Applist = Get-Software | Where-Object { $_.DisplayName -eq $App_Name } | select Displayname, Uninstallstring
$Console = Get-Software | Where-Object { $_.DisplayName -eq 'Arcserve UDP Console' }
$RecoveryPointServer = Get-Software | Where-Object { $_.DisplayName -eq 'Arcserve UDP Recovery Point Server' }

If ($Applist -ne $null) {
	If ($Console -ne $null -or $RecoveryPointServer -ne $null) {
		Write-Host "This server is the Arcseve UDP Console or RecoveryPoint server.  Exiting..."
	}
	ElseIf ($ENV:PROCESSOR_ARCHITECTURE -eq 'AMD64') {
		$UninstallerPath = 'C:\Program Files (x86)\Arcserve\SharedComponents\Arcserve Unified Data Protection\Setup\uninstall.exe'
		$ArgumentList = '/q /ALL'
		$Uninstall = Start-Process $UninstallerPath -ArgumentList $ArgumentList -wait -PassThru -NoNewWindow
		$ExitCode = ($Uninstall).ExitCode
		Check-ExitCode
	}
	Else {
		$UninstallerPath = 'C:\Program Files\Arcserve\SharedComponents\Arcserve Unified Data Protection\Setup\uninstall.exe'
		$ArgumentList = '/q /ALL'
		$Uninstall = Start-Process $UninstallerPath -ArgumentList $ArgumentList -wait -PassThru -NoNewWindow
		$ExitCode = ($Uninstall).ExitCode
		Check-ExitCode		
	}
}
Else {
	Write-Host "The $App_Name software does not exist on this machine.  Exiting..."
}