What is the CD key? The CD key (sometimes called the product key) is located on the back cover of your Microsoft Windows CD as shown in the picture which is a unique number for your Windows version. Windows CD key is so important which without it no one would be able to install or to re-install Microsoft Windows. What if I lose my Windows CD key ???? If you lose this key don’t panic, there are some tools and software that can retrieve it back to you (In case…
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