The best replacement for avast antivirus is avg.

The best alternatives to avast antivirus are rated as following:
★★★★★  avg
★  avg antivirus
  spyware doctor
  comodo antivirus

Your alternative for avast antivirus is not listed? Suggest!
Speaking about avast antivirus, one probably shouldn't forget about comodo firewall.

Other search terms related to avast antivirus and their ratings are:
★★★★★ comodo firewall
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