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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
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    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
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http://www.microsoft.com/en-us/download/exe-validation.aspx

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

enter image description here

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.
enter image description here
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.
enter image description here

Courtesy

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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