let me begin with a proof:
this proves that Kaspersky 2020 suspected that c:\windows\system32\tasks\run roboform process is infected. it is not the former file I complained above. moreover it is not a roboform file at all. I compared to previous version file which was clean and there are 2 differences: date and version. other than that it is a readable & editable xml file.
another proof is this:
I let Kaspersky “disinfect” the file without restart and now I’m in KAV 2020 and roboform 18.104.22.168
but still puzzled why no one before tackled this problem
many thanks to all
you have been most helpful