When we activate our Windows OS with activation key, the information is stored in the Windows Registry. Here’s a situation to be avoided. For one reason or the other you have to reinstall the Windows operating system but you discover that you don’t know the product key. Worries Don't worries Use this script to extract your product key from the OS installed on your PC without using any third party software. Open Notepad Copy and paste the following text into the notepad window 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 function Get-WindowsKey {      ## function to retrieve the Windows Product Key from any PC      ## by Nedim Mehic      param ($targets = "." )      $hklm = 2147483650      $regPath = "Software\Microsoft\Windows NT\CurrentVersion"      $regValue = "DigitalProductId"  ...