<#
Author: Gabe Kerntke
Date: 05-28-2024

.Synopsis
Script checks to see if Dell SupportAssist is installed, if installed it will uninstall

.Modified
2024-05-28 (GabeK) - Original script created
2025-04-09 (GabeK) - Rewrote script since it was bluescreening systems

#>

#  Variables  #
$Name = "Dell SupportAssist"
$StoreVersion = "Get-AppxPackage | Select-Object Name, PackageFullName | Format-List"

#  Functions  #

#Function checks for 32 or 64 bit processor and then pulls list of applications accordingly
Function Get-Software ($CPU = $ENV:PROCESSOR_ARCHITECTURE) {
    If ($CPU -eq 'AMD64') { 
        $64bit = Get-ItemProperty HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\* 
        $32bit = Get-ItemProperty HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*
        $32bit + $64bit
    } 
    Else { Get-ItemProperty HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\* }  
}

Function Uninstall-App {
    If ($StoreVersion -contains "*DellSupport*") {
        Get-AppxPackage -Name "*DellSupport*" | Select-Object -ExpandProperty PackageFullName | Remove-AppPackage
        Start-Sleep 10
        Uninstall-App2
    }
    Else { Uninstall-App2 }
}

Function Uninstall-App2 {
    $UninstallString = $Applist | Select-Object -ExpandProperty QuietUninstallString -ErrorAction SilentlyContinue
    If ($null -eq $UninstallString) {
        $UninstallString = $Applist | Select-Object -ExpandProperty UninstallString
        $UninstallString + " /qn /quiet /norestart" | cmd
        Start-Sleep 10
    }
    Else {
        $UninstallString | cmd
        Start-Sleep 10
    }
    If (Get-Software | Where-Object { $_.DisplayName -eq "$Name" -or $_.DisplayName -eq "$Name Remediation" }) {
        Uninstall-App3
    }
    Else {
        Write-Host "$Name uninstalled successfully"
        Remove-Folder
    }
}

Function Uninstall-App3 {    
    $UninstallString2 = $Applist | Select-Object -ExpandProperty PSPath
    $B = $UninstallString2 -replace "Microsoft.PowerShell.Core", ""
    $C = $B.Substring(1)
    Remove-Item -ErrorAction SilentlyContinue -Path $C -Force -Verbose
    Start-Sleep 10
    If (Get-Software | Where-Object { $_.DisplayName -eq "$Name" }) {
        Write-Host "$Name uninstall failed, exting script"
    }
    Else {
        Write-Host "$Name uninstalled successfully"
        Remove-Folder
    }
}

Function Remove-Folder {
    If (Test-Path "C:\Program Files\Dell\SupportAssistAgent") {
        Remove-Item -ErrorAction SilentlyContinue -Path "C:\Program Files\Dell\SupportAssistAgent" -Recurse -Force
    }
    If (Test-Path "C:\Program Files\Dell\SARemediation") {
        Remove-Item -ErrorAction SilentlyContinue -Path "C:\Program Files\Dell\SARemediation" -Recurse -Force
    }
}

#  Script start  #
#Check to see if program is installed
$Applist = Get-Software | Where-Object { $_.DisplayName -eq "$Name" -or $_.DisplayName -eq "$Name Remediation" }
If ($Applist | Where-Object { $_.DisplayName -eq "$Name" -or $_.DisplayName -eq "$Name Remediation" }) {
    Uninstall-App
}
Else {
    Write-Host "$Name is not installed, exiting script"
}
# Script End #