lost my product key after changing windows

Sorry for my weak English

I bought the laptop lenovo 4 years ago and it came with windows 7 home premium active product key on udersurface I changed windows e so many times, but now I want to return to my original copy but off coarse product key lost

what I could do to get him back

can someone help me

Your best option is to ask the Lenovo recovery media if the recovery partition does not work:

http://www-307.IBM.com/PC/support/site.WSS/document.do?lndocid=MIGR-4HWSE3

Computers laptops Lenovo include a function called the Lenovo OneKey Recovery button, which is used to boot into the recovery environment and to reinstall Windows.

or

Lenovo/IBM

http://www-307.IBM.com/PC/support/site.WSS/MIGR-4M7HWZ.html

1-800-426-7378

Tags: Windows

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