I used to use AVG. While they have solved most of the problems of false positives, I noticed that I could not successfully use System Restore with AVG. It had to be shut down and restarted. The only problem is AVG automatically restarts when the system boots back up to finish the Restore process. The only way to prevent this is to uninstall AVG and run down every piece it leaves behind (Revo fixed this just fine). However, it is a pain to have to uninstall the program every time you want to or need to restore. I use Avast now. It isn't perfect, (some false positives and it flags Malware Bytes Antimalware "virus" database tracks as viruses sometimes) but the Sandbox Feature doesn't have an equivalent in AVG. I haven't made up my mind, but it seems like a good idea to run "possibly suspect" files in " a separate" space until sure that it is not malware or crapware.