|I have no faith in free antivirus software because my son uses the free Avast Antivirus (updated every day) yet I'm always having to help him get rid of malware.|
I use Norton Internet Security and malware has never been an issue for me. I suggest you uninstall Avira & install Norton Antivirus, then do a full system scan with it, quite simply it's the best protection in my opinion:
And just in case anyone tells you that Norton slows down your PC, that was certainly true before 2009, but I can assure you that since then Symantec finally fixed it. It is now one of the least resource-hungry security apps you can get.