Ok, I think I get it. InterStat seems to be also the name of a known adware...
We are Interstat SAS (France) and have nothing to do with the adware one. I personally use AdwCleaner for some years now, and it never interfered with our legit softwares. A recent update in the detection base seems to target our softwares too now.
%appdata%\Interstat
HKCU\Softwares\Interstat
What should we do...