downgraded to windows 10 to windows 7 and now it says "not real."

I upgraded from windows 7 to windows 10 for a day and now when I downgraded to windows 7 it says this copy of windows is not genuine...  How to validate my version of windows?

If Windows 7 is pre-installed:

Try the following:

Click Start, right click on computer

Click on properties

Scroll down to the Windows Activation

Click on the link 'change product key '.

Enter the product key located on the COA sticker attached to the bottom of your laptop or in the battery compartment. Click next to activate via the Internet.

COA certificate of authenticity:

http://www.Microsoft.com/howtotell/content.aspx?PG=COA

??

What is the certificate of authenticity for Windows?

http://Windows.Microsoft.com/en-us/Windows7/what-is-the-Windows-certificate-of-authenticity

or

How to activate Windows 7 manually (activate by phone)
 
1) click Start and in the search for box type: slui.exe 4
 
(2) press the ENTER"" key.
 
(3) select your "country" in the list.
 
(4) choose the option "activate phone".
 
(5) stay on the phone (do not select/press all options) and wait for a person to help you with the activation.
 
(6) explain your problem clearly to the support person.
 
http://support.Microsoft.com/kb/950929/en-us

Tags: Windows

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