(1) The free versions of programmes AVG and Avast are good, not to mention Microsoft Security Essentials or Defender, which are free on Windows.” Finally, use common sense.
(2) There are also free, reliable and lightweight antivirus programs available, such as Avast .
(3) On Android, it’s harder to get an overview of which apps have which permissions, but there are plenty of security apps that help here, including free packages from Avast and McAfee.
(4) After studying 20 handsets, security company Avast has warned that the "factory reset" function on Android phones doesn't actually delete data on the phone, which can be retrieved using standard forensic security tools.
(5) But by using forensic tools that directly access the storage areas, Avast was able to reconstruct the files - and make its disconcerting discovery.