ok boy…

i scan with malwarebyte none !

and remove this infection with AVAST in scan mode before power-on !

all ok, and remove now !

BUT WHY in normal use of windows …AVAST
continue to allert to me with avast pop up RED ?

the INFECTION was in:

windows\temp_avast_unp199332570.tmp

the file was: WIN32:sefnit_GD