I am using win7 of valid product key.it work properly but today i saw that my win7 is not geniune.

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Hi, you can check the Key if it is genuine on: http://www.microsoft.com/genuine/ Also you can contact Microsoft Activation Center for confirm: http://www.microsoft.com/india/licensing/resources/vol/numbers.mspx Best&regards Leo HuangPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.