ComputerInfoClass.ps1

class ComputerInfo {
    [string]$ComputerName
    [string]$BIOSManufacturer
    [string]$BIOSVersion
    [string]$Domain
    [int]$Processors
    [int]$Cores
    [int]$TotalPhysicalMemoryGB
    [string]$OSName
    [string]$OSArchitecture
    [string]$Timezone
    [int]$SizeCDriveGB
    [int]$CDriveFreeSpaceGB
    hidden [bool]$LoadAllValues
    hidden [Microsoft.Management.Infrastructure.CimSession]$CimSession

    ComputerInfo(){}
    ComputerInfo([string]$ComputerName,[string]$Domain){
        $this.ComputerName=$ComputerName
        $this.Domain=$Domain
    }
    LoadCimSession(){
        if (!$this.ComputerName){$this.ComputerName=hostname}
        $this.CimSession = New-CimSession -ComputerName $this.ComputerName
    }
    LoadComputerData(){
        if (!$this.CimSession){$this.LoadCimSession()}
        $CimComputer=Get-CimInstance -ClassName Win32_ComputerSystem -CimSession $this.CimSession
        if ($CimComputer.Domain -ne $CimComputer.Workgroup){
            $this.Domain = $CimComputer.Domain
        } else {
            $this.Domain = 'Not Domain joined'
        }
    }
    LoadBiosData(){
            if (!$this.CimSession){$this.LoadCimSession()}
            $CimBios=Get-CimInstance -ClassName Win32_Bios -CimSession $this.CimSession
            $this.BIOSManufacturer = $CimBios.Manufacturer
            $this.BIOSVersion = $CimBios.BIOSVersion -join ';'
        }

    LoadOSData(){
        if (!$this.CimSession){$this.LoadCimSession()}
        $CimOS=Get-CimInstance -ClassName Win32_OperatingSystem -CimSession $this.CimSession
        $this.OSName = $CimOS.Caption
        $this.OSArchitecture = $CimOS.OSArchitecture
    }
    LoadProcessorData(){
        if (!$this.CimSession){$this.LoadCimSession()}
        $CimProcessor=Get-CimInstance -ClassName Win32_Processor -CimSession $this.CimSession
        $this.Processors = $CimProcessor.NumberOfLogicalProcessors
        $this.Cores = $CimProcessor.NumberOfCores
    }
    LoadMemoryData(){
        if (!$this.CimSession){$this.LoadCimSession()}
        $this.TotalPhysicalMemoryGB = $(Get-CimInstance -ClassName win32_PhysicalMemory -CimSession $this.CimSession | Measure-Object -Sum Capacity).Sum/1GB
    }
    LoadTimeZone(){
        if (!$this.CimSession){$this.LoadCimSession()}
        $this.Timezone=Get-CimInstance -ClassName Win32_TimeZone -CimSession $this.CimSession | Select-Object -ExpandProperty Caption
    }
    LoadDiskData(){
        if (!$this.CimSession){$this.LoadCimSession()}
        $CimDisk = Get-CimInstance -ClassName  Win32_LogicalDisk -CimSession $this.CimSession | Where-Object {$_.DeviceID -eq 'C:'}
        $this.SizeCDriveGB = $CimDisk.size/1GB
        $this.CDriveFreeSpaceGB = $CimDisk.FreeSpace/1GB
    }
    [string]GetFreeDiskPctOnC(){
        if (!$this.SizeCDriveGB){$this.LoadDiskData()}
        return "{0:P}" -f ($this.CDriveFreeSpaceGB/$this.SizeCDriveGB)
    }
    ComputerInfo([string]$ComputerName,[bool]$LoadAllValues){
        $this.LoadBiosData()
        $this.LoadCimSession()
        $this.LoadComputerData()
        $this.LoadDiskData()
        $this.LoadMemoryData()
        $this.LoadOSData()
        $this.LoadProcessorData()
        $this.LoadTimeZone()
    }
}

gistfile1.txt

iex ((New-Object System.Net.WebClient).DownloadString('https://gist.githubusercontent.com/Agazoth/4ef9694c3daf50035a9e9f2a2d623e78/raw/96a64abfac6dc87b527bf6e2bb9e284228151132/ComputerInfoClass.ps1'));[ComputerInfo]::new('',$true)