How to Install Avast Premium Security & Activate Its License Key Follow these steps to install your Avast Premium Security: • **Windows** 1. Download and install Avast Premium Security from the official Avast website. 2. Open Avast Premium Security, then go to **Menu > Enter activation code**. 3. Enter the code you received from Murnistore and click **Enter**. 4. Click **Continue** to complete the activation process. • **Mac** 1. Download and install Avast Premium Security from the official AVG website. 2. Open Avast Premium Security, then go to **Menu > Activate paid features**. 3. Enter the code you received from Murnistore and click **Activate**. • **Android** 1. Download and install Avast Premium Security from the Play Store. 2. Open Avast Premium and tap **Scan Now**, then **Allow** to grant Avast Premium Security access to your device. 3. After the scan completes, select **Get full protection**. 4. Tap the **Options (three dots)** in the top-right corner and choose **Already purchased?** 5. Enter the code you received from Murnistore and tap **Use this code**. • **iOS** 1. Download and install Avast Premium Security from the App Store. 2. Open Avast Premium Security and tap **Not now**, then **Allow** to grant Avast Premium Security access to your device. 3. Tap **Upgrade** in the top-right corner, then select **Already purchased?** 4. Enter the code you received from Murnistore and tap **OK**. 5. Tap **OK** once more to complete the activation process.