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how to activate windows7 professional after re-installation where change the product key is not in my computer's property

how to activate windows7 professional after re-installation where change the product key is not in my computer's property
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More about activate windows7 professional installation change product key computer property
  1. There should be a sticker on the back of the PC with the product key on it.
  2. when activation fails the option to change keys occurs. you need to attempt activation first, then if it fails, you well be able to change the key.

    Then use the key on the attached sticker.
  3. Sometimes OEMs (like Dell) will use the same batch of product keys for a series of computers. I have more than one Dell desktop with the same product key on the sticker on top of the desktop case. The way to get the real product key registered to your computer is to download and run "Belarc Advisor" and then note down the product key. At this point you can go to Control Panel ---> System, and select "Change product key" under 'Windows Activation'. Make sure you enter the characters correctly; some are hard to read.
  4. Best answer
    Ubrales said:
    Sometimes OEMs (like Dell) will use the same batch of product keys for a series of computers. I have more than one Dell desktop with the same product key on the sticker on top of the desktop case. The way to get the real product key registered to your computer is to download and run "Belarc Advisor" and then note down the product key. At this point you can go to Control Panel ---> System, and select "Change product key" under 'Windows Activation'. Make sure you enter the characters correctly; some are hard to read.


    if you have a dell, and if you are using dell media, I.E. Windows 7 install disc that is Dell branded, it will install with the key embedded in the bios and reactivation should be unnecessary.
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