Step 1. You will first have to remove the program from your Android device. Step 2. You can now reinstall the software. The process depends on whether you have purchased it from the Google Play Store or from G DATA's official website. A. If you have purchased it from he Google Play Store, make sure that your device is linked to the Google Account you made the purchase from. This can be checked in Settings > Accounts > Google. Now simply open the Play Store and search for "G DATA INTERNET SECURITY". Instead of the option to purchase it, you will be offered to install it. If instead you have purchased the software from G DATA's official website, Step 1. From your Android device, open the following link in your web browser: https://secure.gd/dl-isa-trial Step 2. The download will start. Once it is complete, you will see a message at the bottom of the screen, click OPEN. Step 3. Scroll down and click Install. Step 4. Wait until the application is installed, then Open it Step 5. You will then be asked to activate the application. First check the option I already have an account. Now click on I have read and accepted the end user agreement. This will open the said agreement. Read it then click OK. Step 6. Click Next. Step 7. On the next screen, click Activate on the menu at the top. Then enter your User Name and Password and click Connect at the bottom Step 10. The product is now fully operational.