After installing the free version of Avast, I encountered the aforementioned message, which prevented successful installation. Despite attempting to uninstall Avast from my Windows 10 programs, I couldn't locate it. Consequently, I restarted Windows 10 in safe mode and manually removed the Avast.exe file. Subsequently, I made another attempt to install the full free version of Avast; however, I encountered the same error message as mentioned earlier. I'm now uncertain about the next steps to take. Can you provide guidance on what to do next?