In the Use a purchased License Key field, type or copy/paste your License Key and click Continue. Make sure you enter the License Key exactly as it appears and include the hyphens. If you copy/paste, be sure you do not accidentally select additional space around the text. If you have a CD, type your Activation Key (printed on the label) in the blank field. Be sure to include the hyphens.
Click Continue. You have the option to install a different product in this step, however doing so will keep you from using all of the features in ESET Smart Security Premium.
Your ESET product will automatically use your computer's Windows network setting to determine if you are using a public or a home or office network to determine the appropriate firewall protection levels. To change your firewall protection level for a given network, follow the instructions in our Knowledgebase article.
Your ESET product will start an initial scan of your computer shortly after installation is completed.