Open the computer dialog box, and then click to enter, click on the computer properties to enter, enter theproduct key can be.
Such as the picture,and share a free Windows 7 Professional Product Key:
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Windows product key is a 25-character code. It is used to activate the OS. Microsoft do not provide Windows 7 Product Key – including DVD and Product Key Sticker/Label – for any version of windows 7 to activate without its hardware.
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Next, type in System properties and hit Enter. This will open the Windows Activation dialog box. You can enter the serial number here. Type in the serial number and click on Act.
Because the computer key has a time limit to use, so you need to remember your computer update time and the use of this product key for the next time.
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