Retrieve computer information using Get-CimInstance

Get-ComputerInventory.ps1

$result = [ordered]@{
    ComputerSystem = Get-CimInstance CIM_ComputerSystem | Select-Object -Property `
        'Name',
        'Description',
        'PrimaryOwnerName',
        'ChassisSKUNumber',
        'CurrentTimeZone',
        'DaylightInEffect',
        'DNSHostName',
        'EnableDaylightSavingsTime',
        'HypervisorPresent',
        'Manufacturer',
        'Model',
        'NetworkServerModeEnabled',
        'NumberOfLogicalProcessors',
        'SystemFamily',
        'SystemSKUNumber',
        'SystemType',
        'TotalPhysicalMemory'

    OperatingSystem = Get-CimInstance CIM_OperatingSystem | Select-Object -Property `
        'Caption',
        'InstallDate',
        'LastBootUpTime',
        'LocalDateTime',
        'Version'

    Processor = Get-CimInstance CIM_Processor | Select-Object -Property `
        'L2CacheSize',
        'SocketDesignation',
        'Description',
        'Name',
        'L3CacheSize',
        'Manufacturer',
        'NumberOfCores',
        'NumberOfEnabledCore',
        'NumberOfLogicalProcessors',
        'ProcessorId',
        'ThreadCount'

    Card = Get-CimInstance CIM_Card | Select-Object -Property `
        'Manufacturer',
        'SerialNumber',
        'Version',
        'Product'

    PhysicalMemory = Get-CimInstance CIM_PhysicalMemory | Sort-Object -Property DeviceLocator | Select-Object -Property `
        'Manufacturer',
        'PartNumber',
        'SerialNumber',
        'Tag',
        'FormFactor',
        'Capacity',
        'DataWidth',
        'InterleavePosition',
        'Speed',
        'ConfiguredClockSpeed',
        'ConfiguredVoltage',
        'DeviceLocator',
        'InterleaveDataDepth'

    PhysicalMemoryArray = Get-CimInstance Win32_PhysicalMemoryArray | Select-Object -Property `
        'MaxCapacity',
        'MemoryDevices'

    DiskDrive = Get-CimInstance CIM_DiskDrive | Sort-Object -Property Index | Select-Object -Property `
        'BytesPerSector',
        'Index',
        'Size',
        'FirmwareRevision',
        'Model',
        'SerialNumber'

    # Ignore Remote Desktop Connection controller
    VideoController = Get-CimInstance CIM_VideoController | Where-Object { $_.Description -notlike '*Remote*' } | Select-Object -Property `
        'Description',
        'CurrentRefreshRate',
        'VideoProcessor',
        'AdapterRAM',
        'DriverDate',
        'DriverVersion',
        'VideoModeDescription'
}

# Physical adapters only
Get-CimInstance Win32_NetworkAdapter | 
    Where-Object { $_.PNPDeviceID -like 'PCI\*' } | 
        Sort-Object -Property 'DeviceID' | 
            Foreach-Object -Begin { $i = 0 } -Process {
                $result["NetworkAdapter$i"] = $_ | Select-Object -Property `
                    'Name',
                    'AdapterType',
                    'InterfaceIndex',
                    'MACAddress',
                    'Manufacturer',
                    'NetConnectionID',
                    'NetConnectionStatus',
                    'NetEnabled',
                    'ServiceName',
                    'TimeOfLastReset'

                $netAdapter = $_
                $result["NetworkAdapterConfiguration$i"] = Get-CimInstance Win32_NetworkAdapterConfiguration | Where-Object { $_.IPEnabled -and $_.MACAddress -eq $netAdapter.MACAddress } | Select-Object -Property `
                    'DHCPLeaseExpires',
                    'Description',
                    'DHCPEnabled',
                    'DHCPLeaseObtained',
                    'DHCPServer',
                    'DNSDomain',
                    'DNSDomainSuffixSearchOrder',
                    'DNSEnabledForWINSResolution',
                    'DNSHostName',
                    'DNSServerSearchOrder',
                    'DomainDNSRegistrationEnabled',
                    'FullDNSRegistrationEnabled',
                    'IPAddress',
                    'IPConnectionMetric',
                    'DefaultIPGateway',
                    'IPSubnet',
                    'MACAddress'

                $i++
            }


# Flatten
$result.Keys | Foreach-Object -Begin { $flattenedResult = [ordered]@{} } -Process {
    $key = $_
    if ($result[$key]) {
        $result[$key] | Get-Member -MemberType NoteProperty | ForEach-Object {
            $flattenedResult["$($key).$($_.Name)"] = $result[$key].$($_.Name)        
        }
    }
}

$flattenedResult