Disclaimer
This is my personal blog. The opinions and views I express are my own. The information I provide is on an as-is basis. I make no representations as to accuracy, completeness, currentness, suitability, or validity of any information on this blog and will not be liable for any errors, omissions, or delays in this information or any losses, injuries or damages arising from its use.

Remote Computer Inventory with PowerShell

The most current version of this script can be found here: https://www.signalwarrant.com/remote-computer-inventory-with-powershell-vnext-2020-edition/

This script uses WMI CMDlets for the most part, to gather some client hardware and software information remotely over the network. Click the link below to see the contents of the CSV file. I use it to collect the following information:

  • Computer Name
  • Manufacturer
  • Model
  • Processor Type
  • System Type
  • Operating system
  • Operating system Version
  • Operating system Build Version
  • Serial Number
  • IP Address MAC Address
  • Last User logged in
  • Last User login time
  • C: free space in GBs
  • Total RAM in GBs
  • The date and time of the last reboot

Computer_inventory_spreadsh

The video below goes into a little more detail as far as the mechanics. In subsequent videos I plan to turn this into a function and possibly a workflow in order to make it a little more efficient.

#  *** THIS SCRIPT IS PROVIDED WITHOUT WARRANTY, USE AT YOUR OWN RISK ***
<#

.DESCRIPTION
	Use WMI to gather hardware and software information remotely from domain clients.
    The script pings a list of computernames and runs the inventory on livePCs.txt.
    Once all the hardware/software information is collected, all the data is exported
    to a CSV file. 

.NOTES
	File Name: Get-Inventory.ps1
	Author: David Hall
	Contact Info: 
		Website: www.signalwarrant.com
		Twitter: @signalwarrant
		Facebook: facebook.com/signalwarrant/
		Google +: plus.google.com/113307879414407675617
		YouTube Subscribe link: https://www.youtube.com/c/SignalWarrant1?sub_confirmation=1
	Requires: PowerShell Remoting Enabled (Enable-PSRemoting) 
	Tested: PowerShell V5, Windows 10, Windows Server 2012 R2

.PARAMETER 
    No parameters, just change the execution policy and run the script
		 
.EXAMPLE
     
#>

$testcomputers = Get-Content -Path 'C:\scripts\computers.txt'
$exportLocation = 'C:\scripts\pcInventory.csv'

# Test connection to each computer before getting the inventory info
foreach ($computer in $testcomputers) {
  if (Test-Connection -ComputerName $computer -Quiet -count 2){
    Add-Content -value $computer -path c:\scripts\livePCs.txt
  }else{
    Add-Content -value $computer -path c:\scripts\deadPCs.txt
  }
}


# Now that we know which PCs are live on the network
# proceed with the inventory

$computers = Get-Content -Path 'C:\scripts\livePCs.txt'

foreach ($computer in $computers) {
    $Bios = Get-WmiObject win32_bios -Computername $Computer
    $Hardware = Get-WmiObject Win32_computerSystem -Computername $Computer
    $Sysbuild = Get-WmiObject Win32_WmiSetting -Computername $Computer
    $OS = Get-WmiObject Win32_OperatingSystem -Computername $Computer
    $Networks = Get-WmiObject Win32_NetworkAdapterConfiguration -ComputerName $Computer | Where-Object {$_.IPEnabled}
    $driveSpace = Get-WmiObject win32_volume -computername $Computer -Filter 'drivetype = 3' | 
    Select-Object PScomputerName, driveletter, label, @{LABEL='GBfreespace';EXPRESSION={'{0:N2}' -f($_.freespace/1GB)} } |
    Where-Object { $_.driveletter -match 'C:' }
    $cpu = Get-WmiObject Win32_Processor  -computername $computer
    $username = Get-ChildItem "\\$computer\c$\Users" | Sort-Object LastWriteTime -Descending | Select-Object Name, LastWriteTime -first 1
    $totalMemory = [math]::round($Hardware.TotalPhysicalMemory/1024/1024/1024, 2)
    $lastBoot = $OS.ConvertToDateTime($OS.LastBootUpTime) 

    $IPAddress  = $Networks.IpAddress[0]
    $MACAddress  = $Networks.MACAddress
    $systemBios = $Bios.serialnumber

    $OutputObj  = New-Object -Type PSObject
    $OutputObj | Add-Member -MemberType NoteProperty -Name ComputerName -Value $Computer.ToUpper()
    $OutputObj | Add-Member -MemberType NoteProperty -Name Manufacturer -Value $Hardware.Manufacturer
    $OutputObj | Add-Member -MemberType NoteProperty -Name Model -Value $Hardware.Model
    $OutputObj | Add-Member -MemberType NoteProperty -Name Processor_Type -Value $cpu.Name
    $OutputObj | Add-Member -MemberType NoteProperty -Name System_Type -Value $Hardware.SystemType
    $OutputObj | Add-Member -MemberType NoteProperty -Name Operating_System -Value $OS.Caption
    $OutputObj | Add-Member -MemberType NoteProperty -Name Operating_System_Version -Value $OS.version
    $OutputObj | Add-Member -MemberType NoteProperty -Name Operating_System_BuildVersion -Value $SysBuild.BuildVersion
    $OutputObj | Add-Member -MemberType NoteProperty -Name Serial_Number -Value $systemBios
    $OutputObj | Add-Member -MemberType NoteProperty -Name IP_Address -Value $IPAddress
    $OutputObj | Add-Member -MemberType NoteProperty -Name MAC_Address -Value $MACAddress
    $OutputObj | Add-Member -MemberType NoteProperty -Name Last_User -Value $username.Name
    $OutputObj | Add-Member -MemberType NoteProperty -Name User_Last_Login -Value $username.LastWriteTime
    $OutputObj | Add-Member -MemberType NoteProperty -Name C:_FreeSpace_GB -Value $driveSpace.GBfreespace
    $OutputObj | Add-Member -MemberType NoteProperty -Name Total_Memory_GB -Value $totalMemory
    $OutputObj | Add-Member -MemberType NoteProperty -Name Last_ReBoot -Value $lastboot
    $OutputObj | Export-Csv $exportLocation -Append -NoTypeInformation
  }

UPDATE: Below are the new video and the code for the functionalized version of the script above.

#  *** THIS SCRIPT IS PROVIDED WITHOUT WARRANTY, USE AT YOUR OWN RISK ***
<#

.DESCRIPTION
	Use WMI to gather hardware and software information remotely from domain clients.
    The script pings a list of computernames and runs the inventory on livePCs.txt.
    Once all the hardware/software information is collected, all the data is exported
    to a CSV file. 

.NOTES
	File Name: Get-Inventory.ps1
	Author: David Hall
	Contact Info: 
		Website: www.signalwarrant.com
		Twitter: @signalwarrant
		Facebook: facebook.com/signalwarrant/
		Google +: plus.google.com/113307879414407675617
		YouTube Subscribe link: https://www.youtube.com/c/SignalWarrant1?sub_confirmation=1
	Requires: PowerShell Remoting Enabled (Enable-PSRemoting) 
	Tested: PowerShell V5, Windows 10, Windows Server 2012 R2

.PARAMETER 
    ComputerName(s), see the examples below.
		 
.EXAMPLE
     .\Get-Inventory.ps1 -ComputerName CL1
     .\Get-Inventory.ps1 -ComputerName CL1, CL2
     .\Get-Inventory.ps1 -ComputerName (Get-Content -Path "C:\computers.txt")

.REFERENCES
    https://technet.microsoft.com/en-us/library/hh847806.aspx
     
#>

Function Get-Inventory {
    [CmdletBinding()]
    Param(
        [Parameter(Mandatory=$True)]
        [string[]]$Computers
        )


$exportLocation = "$env:HOMEDRIVE\scripts\"

# Test connection to each computer before getting the inventory info
foreach ($computer in $Computers) {
  if (Test-Connection -ComputerName $computer -Quiet -count 2){
    Add-Content -value $computer -path "$exportLocation\livePCs.txt"
  }else{
    Add-Content -value $computer -path "$exportLocation\deadPCs.txt"
  }
}


# Now that we know which PCs are live on the network
# proceed with the inventory

$computers = Get-Content -Path "$exportLocation\livePCs.txt"

foreach ($computer in $computers) {
    $Bios = Get-WmiObject -Class win32_bios -ComputerName $Computer
    $Hardware = Get-WmiObject -Class Win32_computerSystem -ComputerName $Computer
    $Sysbuild = Get-WmiObject -Class Win32_WmiSetting -ComputerName $Computer
    $OS = Get-WmiObject -Class Win32_OperatingSystem -ComputerName $Computer
    $Networks = Get-WmiObject -Class Win32_NetworkAdapterConfiguration -ComputerName $Computer | Where-Object {$_.IPEnabled}
    $driveSpace = Get-WmiObject -Class win32_volume -ComputerName $Computer -Filter 'drivetype = 3' | 
    Select-Object -Property PScomputerName, driveletter, label, @{LABEL='GBfreespace';EXPRESSION={'{0:N2}' -f($_.freespace/1GB)} } |
    Where-Object { $_.driveletter -match 'C:' }
    $cpu = Get-WmiObject -Class Win32_Processor  -ComputerName $computer
    $username = Get-ChildItem "\\$computer\c$\Users" | Sort-Object -Property LastWriteTime -Descending | Select-Object -Property Name, LastWriteTime -First 1
    $totalMemory = [math]::round($Hardware.TotalPhysicalMemory/1024/1024/1024, 2)
    $lastBoot = $OS.ConvertToDateTime($OS.LastBootUpTime) 

    $IPAddress  = $Networks.IpAddress[0]
    $MACAddress  = $Networks.MACAddress
    $systemBios = $Bios.serialnumber

    $OutputObj  = New-Object -TypeName PSObject
    $OutputObj | Add-Member -MemberType NoteProperty -Name ComputerName -Value $Computer.ToUpper()
    $OutputObj | Add-Member -MemberType NoteProperty -Name Manufacturer -Value $Hardware.Manufacturer
    $OutputObj | Add-Member -MemberType NoteProperty -Name Model -Value $Hardware.Model
    $OutputObj | Add-Member -MemberType NoteProperty -Name Processor_Type -Value $cpu.Name
    $OutputObj | Add-Member -MemberType NoteProperty -Name System_Type -Value $Hardware.SystemType
    $OutputObj | Add-Member -MemberType NoteProperty -Name Operating_System -Value $OS.Caption
    $OutputObj | Add-Member -MemberType NoteProperty -Name Operating_System_Version -Value $OS.version
    $OutputObj | Add-Member -MemberType NoteProperty -Name Operating_System_BuildVersion -Value $SysBuild.BuildVersion
    $OutputObj | Add-Member -MemberType NoteProperty -Name Serial_Number -Value $systemBios
    $OutputObj | Add-Member -MemberType NoteProperty -Name IP_Address -Value $IPAddress
    $OutputObj | Add-Member -MemberType NoteProperty -Name MAC_Address -Value $MACAddress
    $OutputObj | Add-Member -MemberType NoteProperty -Name Last_User -Value $username.Name
    $OutputObj | Add-Member -MemberType NoteProperty -Name User_Last_Login -Value $username.LastWriteTime
    $OutputObj | Add-Member -MemberType NoteProperty -Name C:_FreeSpace_GB -Value $driveSpace.GBfreespace
    $OutputObj | Add-Member -MemberType NoteProperty -Name Total_Memory_GB -Value $totalMemory
    $OutputObj | Add-Member -MemberType NoteProperty -Name Last_ReBoot -Value $lastboot
    $OutputObj | Export-Csv -Path "$exportLocation\pcsinventory.csv" -Append -NoTypeInformation
  }
}

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