PowerShell Hardware & Software Inventory Script

# SCRIPT_NAME: Get-HardwareInventory.ps1
# DESCRIPTION: Gathers detailed hardware and software information and outputs to a CSV file.
# PARAMETERS:
# -c: Consolidates all individual inventory CSVs in the output directory into a single, comprehensive report.

param(
    [switch]$c
)

# --- CONFIGURATION ---
$outputDir = "C:\InventoryReports"
$consolidationFile = "Consolidated_Inventory_Report.csv"

# --- CONSOLIDATION LOGIC ---
if ($c) {
    if (-not (Test-Path $outputDir)) {
        Write-Host "Output directory not found. Please run the script on client machines first." -ForegroundColor Red
        exit
    }
    
    $csvFiles = Get-ChildItem -Path $outputDir -Filter "*.csv" | Where-Object { $_.Name -ne $consolidationFile }
    if (-not $csvFiles) {
        Write-Host "No individual inventory CSV files found to consolidate." -ForegroundColor Yellow
        exit
    }
    
    Write-Host "Consolidating all inventory files..."
    $allData = @()
    foreach ($file in $csvFiles) {
        $allData += Import-Csv -Path $file.FullName
    }
    
    $allData | Export-Csv -Path (Join-Path $outputDir $consolidationFile) -NoTypeInformation -Force
    Write-Host "Consolidation complete. Report saved to $($consolidationFile)." -ForegroundColor Green
    exit
}

# --- INVENTORY COLLECTION LOGIC ---
# Create output directory if it does not exist
if (-not (Test-Path $outputDir)) {
    New-Item -ItemType Directory -Path $outputDir | Out-Null
}

try {
    # Gather System Information
    $osInfo = Get-CimInstance -ClassName Win32_OperatingSystem
    $computerInfo = Get-CimInstance -ClassName Win32_ComputerSystem
    $biosInfo = Get-CimInstance -ClassName Win32_BIOS
    $networkInfo = Get-CimInstance -ClassName Win32_NetworkAdapterConfiguration | Where-Object { $_.IPAddress }
    $processorInfo = Get-CimInstance -ClassName Win32_Processor
    $ramInfo = (Get-CimInstance -ClassName Win32_PhysicalMemory | Measure-Object -Property Capacity -Sum).Sum / 1GB
    $gpuInfo = Get-CimInstance -ClassName Win32_VideoController
    $storageInfo = Get-CimInstance -ClassName Win32_LogicalDisk | Where-Object { $_.DriveType -eq 3 }
    $monitors = Get-CimInstance -ClassName Win32_DesktopMonitor

    # Get Uptime
    $lastBootTime = (Get-CimInstance Win32_OperatingSystem).LastBootUpTime
    $uptime = (New-TimeSpan -Start $lastBootTime).ToString("g")

    # Get Installed Software
    $installedApps = Get-ItemProperty HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*, HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\* |
                     Select-Object DisplayName, DisplayVersion, Publisher, InstallDate | Where-Object {$_.DisplayName -ne $null} | Sort-Object DisplayName

    # Create a custom object for the report
    $report = [PSCustomObject]@{
        "Date of Inventory" = Get-Date -Format "yyyy-MM-dd HH:mm:ss"
        "Hostname" = $computerInfo.Name
        "IP Address" = ($networkInfo.IPAddress | Select-Object -First 1) -join ', '
        "MAC Address" = ($networkInfo.MACAddress | Select-Object -First 1) -join ', '
        "Username" = $computerInfo.PrimaryOwnerName
        "Computer Type" = $computerInfo.PCSystemTypeDescription
        "Manufacturer" = $computerInfo.Manufacturer
        "Model" = $computerInfo.Model
        "Serial Number" = $biosInfo.SerialNumber
        "BIOS Version" = $biosInfo.SMBIOSBIOSVersion
        "CPU" = $processorInfo.Name
        "RAM (GB)" = [math]::Round($ramInfo, 2)
        "Total Storage (GB)" = [math]::Round(((Get-CimInstance -ClassName Win32_LogicalDisk | Where-Object {$_.DriveType -eq 3} | Measure-Object -Property Size -Sum).Sum / 1GB), 2)
        "Free Storage (GB)" = [math]::Round(((Get-CimInstance -ClassName Win32_LogicalDisk | Where-Object {$_.DriveType -eq 3} | Measure-Object -Property FreeSpace -Sum).Sum / 1GB), 2)
        "GPU(s)" = ($gpuInfo.Name -join ', ')
        "OS Name" = $osInfo.Caption
        "OS Version" = $osInfo.Version
        "Uptime" = $uptime
        "Monitor(s)" = ($monitors.Name -join ', ')
        "Installed Applications" = ($installedApps.DisplayName -join ', ')
    }
    
    # Define the output file path
    $outputFile = Join-Path $outputDir "$($computerInfo.Name)_inventory.csv"
    
    # Export the report to CSV
    $report | Export-Csv -Path $outputFile -NoTypeInformation -Force
    
    Write-Host "Inventory complete. Report saved to $($outputFile)." -ForegroundColor Green

} catch {
    Write-Host "An error occurred during inventory collection: $($_.Exception.Message)" -ForegroundColor Red
}