Get system information from WMI remotely with PowerShell script

Setup: Remote computer with WMI enabled and firewall open

Problem: You want to collect various information remotely

Solution:

Copy this script and save it on the disk with .ps1 extension. eg. Get-ComputerDetails.ps1
Open PowerShell console and execute the script.

# The script takes the name of the remote computer as parameter
param(
      [string] $strComputer
	  )
# ask for credentials to connect to remote computer. Credentials can be stored on the disk for unattended execution.
$cred = get-credential

$result = "" | select Name
		Add-Member -memberType NoteProperty -name Uptime -inputObject $result -value ""
		Add-Member -memberType NoteProperty -name DNS_IP_Address -inputObject $result -value ""
		Add-Member -memberType NoteProperty -name No_Processors -inputObject $result -value 0
		Add-Member -memberType NoteProperty -name No_Cores_perProcessor -inputObject $result -value 0
		Add-Member -memberType NoteProperty -name Processor_Type -inputObject $result -value ""
		Add-Member -memberType NoteProperty -name Processor_Speed -inputObject $result -value ""
		Add-Member -memberType NoteProperty -name No_Memory_Slots_Used -inputObject $result -value 0
		Add-Member -memberType NoteProperty -name RAM_Configuration -inputObject $result -value "N/A"
		Add-Member -memberType NoteProperty -name RAM_Total_MB -inputObject $result -value ""
		Add-Member -memberType NoteProperty -name caption -inputObject  $result -value ""
		Add-Member -memberType NoteProperty -name domain -inputObject  $result -value ""
		Add-Member -memberType NoteProperty -name Service_Pack -inputObject  $result -value ""
		Add-Member -memberType NoteProperty -name SystemType -inputObject  $result -value ""
		Add-Member -memberType NoteProperty -name Manufacturer -inputObject  $result -value ""
		Add-Member -memberType NoteProperty -name Model -inputObject  $result -value ""

$result.name = $strComputer

# Find the IP address registered in DNS
$result.DNS_IP_Address=([System.Net.Dns]::GetHostAddresses($strComputer) | select IPAddressToString).IPAddressToString

# Query WMI for basic information about the OS
$OS = get-wmiobject Win32_OperatingSystem -computername $strComputer -credential $cred| select caption,csdversion,LastBootUpTime
$result.caption = $OS.Caption
$result.Service_Pack = $OS.CSDVersion

# Query WMI information remotely about computer hardware
$Computer = get-wmiobject Win32_computerSystem -computername $strComputer -credential $cred| select domain,systemtype,Manufacturer,Model,TotalPhysicalMemory,NumberOfProcessors
$result.domain = $computer.domain.split(".")[0].toupper()
$result.SystemType = $Computer.SystemType.trimend("-based PC")
$result.Manufacturer = $Computer.Manufacturer.trimend("Corporation")
$result.Model = $Computer.Model

# Query WMI information remotely about processors and number of cores
$processors = get-wmiobject win32_Processor -computername $strComputer -credential $cred| select Name,MaxClockSpeed,NumberOfCores
$result.No_Processors = $Computer.NumberOfProcessors

if ($Computer.NumberOfProcessors -eq 1) {
	$result.Processor_Type = $processors.Name -replace "\s *", " "
	$result.Processor_Speed = $processors.MaxClockSpeed
	if ($processors.NumberOfCores) {$result.No_Cores_perProcessor = $processors.NumberOfCores}
	} else {
	if ($processors.NumberOfCores) {$result.No_Cores_perProcessor = $processors.NumberOfCores}
	$result.Processor_Type = $processors[0].Name -replace "\s *", " "
	$result.Processor_Speed = $processors[0].MaxClockSpeed
	}
# Compute the uptime of the system
$lastboot = [System.Management.ManagementDateTimeconverter]::ToDateTime("$($OS.LastBootUpTime)")
$uptime = (Get-Date) - $lastboot
$result.Uptime = $uptime.days.tostring()+" days, "+$uptime.hours.tostring()+" hours"

#Query WMI information remotely about memory configuration
$memory = get-wmiobject win32_PhysicalMemory -computername $strComputer -credential $cred|  select devicelocator,capacity
$result.No_memory_slots_used = $memory.count
$MemoryConfiguration = ""
if ($Computer.Model -ne "Virtual Machine") {
	foreach ($memorybank in $memory)
		{
		$memcap= "{0:N0}" -f ($memorybank.capacity/1GB)
		$MemoryConfiguration += ";"+$memorybank.DeviceLocator + ", " + $memcap + "GB"

		}
		$result.RAM_Configuration = $MemoryConfiguration.substring(1)
		}
		[int]$mem = $Computer.TotalPhysicalMemory/1mb
		$result.RAM_Total_MB = $mem
$result

Tip 1: For unattended execution save the credentials on the disk and load them at run-time. Store a secure string (eg. a password) localy on disk in PowerShell

Tip 2: Export the result to csv adding this line at the end of the script

 $result | Export-Csv -NoTypeInformation c:\path_to_file.csv