|What is Product Key
Product key (also known as CD key, activation code or serial number) is a usually unique, alphanumeric code of any length required by many software programs during installation. Unique product keys help software manufacturers ensure that each copy of their software was legally purchased.
All Microsoft Windows operating system versions require the entry of unique product keys during the installation process. Below is an example of what the product key looks like:
Since product keys are required during installation, finding that you've lost a product key could be a serious problem if you need to reinstall a program. Luckily, Product Key Finder provides an easy way to retrieve lost product keys.