How to Install and Activate Avast CleanUp Premium Key Follow these steps to install Avast CleanUp Premium: • Windows 1. Download and install Avast CleanUp Premium from the official Avast website. 2. Click "Activate" during the initial setup of the application, or open the "Menu" and select "Enter activation code." 3. Enter the code you obtained from Murnistore on the Itemku marketplace, then click "Enter." 4. Click "Activate & Install" to proceed with the installation process. • Mac 1. Download and install Avast CleanUp Premium from the official Avast website. 2. Open Avast CleanUp Premium and click "Enter activation code." 3. Enter the code you obtained from Murnistore on the Itemku marketplace, then click "Activate." • Android 1. Download and install Avast CleanUp Premium from the Play Store. 2. Open Avast CleanUp Premium and tap "Upgrade." 3. Tap "More options (three dots)" in the top right corner and select "Already purchased?" 4. Choose "Use activation code." 5. Enter the code you obtained from Murnistore on the Itemku marketplace, then tap "Use this code."