How can I remove viruses? My dad's phone got infected with a virus. The virus will auto enable the WIFI despite after disabling it for a few seconds. Factory restore doesn't work too, the virus came back. I have installed antivirus such as kaspersky, norton, and dr web. They are all unable remove the virus, it re-install itself after removal. It's running on android 4.4.

Here is the screen shot of what dr web's report



It keeps downloading back these applications



Can anyone please advice me on what to do?
Like above ...

If the file is persistent or un-deletable
 (usually the associated binary files under system > bin)
You need to use a Chattr first ..



busybox chattr -ia /system/bin/viralFile    



and then    



rm /system/bin/viralFile     



This is helpful for force removing virus or non-deletable files,  like most people on here that have used KingRoot or similar programs, it's a last option for hard to remove files !