Hi
Sorry for kinda resurrecting this, but I have the exact same problem that is described by the guy who opened this thread.
On my desktop computer, it starts fine.
On my laptop however, no.
Both are Windows 10 fully updated.
I have no other real-time security software except default Windows defender on both computers.
I used to have BitDefender on the laptop but uninstalled a week ago or so.
The contents of this location
C:\Users\Username\AppData\Local\ESET\ESETOnlineScanner
are
eos3ini.json
periodic_notify_scan.png
periodic_notify_upgrade.png
on both computers. I compared the json file from the desktop and from the laptop and there are 3 differences, long shot but maybe it has something to do with this?
Desktop computer (scanner works)
"PromoID":3,
"CTID":884,
"LangID":1033,
Laptop (scanner DOESN'T work)
"PromoID":0,
"CTID":6808,
"LangID":1071,
Unfortunately I cannot say when this started because I haven't used ESET online scanner in God knows how many years.