Hi Ian, thanks for your kind response. See the latest screenshot showing these strange txt files which contain exactly same contents as below. I don't use any aircraft SW or drone SW at all... Nothing to do with flight things at all. Through AV scan, these files are not picked up. Still curious and concerned...
c:\Windows\Airplanelog_.txt
Airplane debug Message:Retrieve Output buffer Dec 18 2019 15:02:51
Airplane debug Message : what I want ? reply : 0x1
Airplane debug Message : report switch state value ? value = 1
=====================
c:\Windows\Airplanelog_漰맗햆栰맗햆.txt
Airplane debug Message:Retrieve Output buffer Dec 18 2019 15:02:51
Airplane debug Message : what I want ? reply : 0x1
Airplane debug Message : report switch state value ? value = 1
=====================
c:\Windows\Airplanelog_蘿몦햆媀怒삃 度삃ᗂ⏐2.txt
Airplane debug Message:Retrieve Output buffer Dec 18 2019 15:02:51
Airplane debug Message : what I want ? reply : 0x1
Airplane debug Message : report switch state value ? value = 1