Greetings

I got exactly the same problem last days simultaneously on 4 PC and 2 notebooks (WIFI without physical links, and no use of USB drive/key) at the same time/same place :
C:\Windows\Temp_avast_ (a “temp file” don’t remember the name) that was correctly deleted after reboot
Since yesterday
C:\ProgramData\Microsoft\Windows Defender\Scans\mpcache-1927DB…FBFA.bin.vb
But strange : no typical trace of this TRJ after register deep seeking in safe mode :-\

Does anyone knows more about this ?