How to activate ESET Internet Security software in Windows
Then after the installation of the software, follow below steps:
1- Open your ESET product. To open the main program window, click the Show hidden icons arrow on the taskbar and then click the ESET icon .
If your product is not activated, your main window will be red:
2- Click Help and support→Change License.
3- Click Use a purchased License Key. This step is not present in Version 10 ESET products.
Version 10.x: Skip to step 4.
4- Type or copy/paste your License Key into the License Key field and then click Continue. Make sure you enter the License Key exactly as it appears and include the hyphens. If you copy/paste be sure you don’t accidentally select additional space around the text.
Version 10.x: Type or copy/paste your License Key into the License Key field, click Activate, and then skip to step 6.
5- Click Activate.
6- Click Done. You have successfully activated your product.