IF (((Get-WmiObject -class Win32_OperatingSystem).version) -match 6.2) {

    write-host "Windows Version: 8.0 was detected."
    Set-Variable -Name OSVersion -Value "Win8.0"

} #end if

ELSEIF (((Get-WmiObject -class Win32_OperatingSystem).version) -match 6.3) {

    write-host "Windows Version: 8.1 was detected."
    Set-Variable -Name OSVersion -Value "Win8.1"

} #end elseif

ELSEIF (((Get-WmiObject -class Win32_OperatingSystem).version) -match 10.0) {

    Write-Host "Windows Version: 10.0 was detected."
    Set-Variable -Name OSVersion -Value "Win10.0"

} #end elseif

ELSE {

    Write-Host "Windows Version:" ((Get-WmiObject -class Win32_OperatingSystem).version) "was detected."
    Write-Host "ERROR: The Operation-System Version is unknown, cant proceed!"
    Write-Host "This Script works only with Windows 8, 8.1 and 10 Versions."

} #end else