Method 1: Uninstall previous antivirus or security tool 1. When installing any other security system on your computer, it is very important to check the previously installed tools. 2. If you have already installed the tools, you must remove them. 3. Select a control panel and go to the program settings and functions. 4. Remove the old system or security product from the list. 5. Wait for the removal process to complete. 6. Now you can reinstall McAfee Antivirus on your computer. You need to make sure your internet connection is working well. Read More: https://www.thepcsecure.com/fix-mcafee-antivirus-error-code-12152/