read OS name – Service Pack – last boot – up time

powershell-001.ps1

# read info from the current host
# replace "." with your remote host - if you like
$OS = get-wmiobject win32_operatingsystem -ComputerName .

# default values
$OSSP = "{n.a}"
$OSName = "{n.a}"
$OSLastBoot = "{n.a}"
$OSUpTime = "{n.a}"

#check host values are not equal null
if($OS.CSDVersion -ne $Null) {
    $OSSP = $OS.CSDVersion.toString()
}
if($OS.Caption -ne $Null) {
    $OSName = $OS.Caption.toString()
}
if($OS.LastBootUpTime -ne $Null ) {
    $OSLastBoot = $OS.converttodatetime($OS.LastBootUpTime)
    $OSUpTime =  New-TimeSpan (get-date $OSLastBoot)
}
# String.Format example in powershell
$out = [String]::Format("OS name : {0} - Service Pack : {1} - Last Boot at : {2} `n", $OSName, $OSSP,$OSLastBoot)
$out += [String]::Format("Server Up Time is in Days : {0} - Hours : {1} - Min : {2}", $OSUpTime.Days , $OSUpTime.Hours , $OSUpTime.Minutes)

# console output
Write-Host $out