Soon I am going to buy a used laptop computer. I am checking advertisements, and some of the sellers promise a genuine copy of Windows 7 OS installed on the system.

On a couple of occasions I have already seen Windows genuine tests showing that the installed OS has a valid license. Later however, it proved to be a cracked copy.

When trying out the potential new computer, how to make sure that the installed Windows 7 actually is genuine, and not a cracked version ?

  • Purchase for an a Microsoft OEM – Ramhound Feb 28 '14 at 3:03
  • 2
    Surely if the Laptop was sold new with an OEM copy of Windows, and the license is affixed to the laptop, it must be a legitimate copy of Windows. (OEM licenses are bound to the system they were supplied with and according to the license can't be transferred - thus if the OEM sold it with Windows 7 surely it must still have a license for that Windows 7) – davidgo Feb 28 '14 at 3:36
  • Windows 8.x does things better. If you purchase a laptop that "comes" with a Windows 8 licence, that licence is actually encrypted in the laptop's BIOS. You can wipe the hard drive clean and use an OEM Windows 8.x install DVD to re-install the OS. Windows will pick up the key in the BIOS without ever asking you. Too easy. You can always google laptop specifications to check if a particular model comes with a Windows 8.x license. cnet.com/news/windows-8-moves-to-bios-based-product-keys – misha256 Aug 19 '15 at 5:12


Download the genuine validation tool. Even if they have messed with the validator that is part of Windows this should still pick it up.

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If you download the Genuine Validation Tool, it will tell you if the PRODUCT KEY is genuine, or is being a cracked version. However it will not check Whether windows 7 was installed using some tampered ISO !

I suggest you try use the Magical Jelley Bean Key Finder, it will fetch you the product key ( that was used on installation ) from the registry if it is legit.

Also if you will do a clean install yourslef, download the genuine official Windows ISO . That's just my paranoid self though :x

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Method 1 – Activate Windows Dialog

The first way to validate that Windows 7 is genuine is to click on Start, then type in activate windows in the search box.
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If your copy of Windows 7 is activated and genuine, you will ge t a message that says “Activation was successful” and you will see the Microsoft Genuine software logo on the right hand side

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Method 2 – Control Panel

The third way to check for genuine Windows 7 is to go to the Control Panel. Click on Start, then Control Panel, then click on System and Security, and finally click on System.
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Then scroll all the way down to the bottom and you should see a section called Windows activation, which says “Windows is activated” and gives you the Product ID. It also includes the genuine Microsoft software logo.
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Method 3 : open cmd.exe and type:

slmgr.vbs /dli

you can see licenced status as follows:
enter image description here

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