Don't know which of my two copies of Windows 7 to use

Hi, sounds like a stupid question, but I have two copies of Windows 7, the one installed on the machine 1 and another which is installed on machine 2, who is now dead.  I want to use the product key from machine 2 (these are these two retail licenses) on my new machine 3, but I don't remember which of the product keys I used to machine 2.  I'm worried if I'll take a guess and be wrong, it will disable the machine 1.  Any suggestions on the best way to go about this?  Thank you!

Compare key - license in use

Click Start, type: cmd

Right-click on CMD

Click on run as administrator

At the command prompt, type the following command:

slmgr - dli

Press enter on your keyboard

This will reveal the key to partial product that give a clue. Compare it with the keys that you have and it will confirm which copy is in use.

Tags: Windows

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