Would be nice and good to know where you downloaded the HiveOS !!!
Or what you have downloaded after you have installed it , possible you got some kind of malware with one of the downloads ,
or you downloaded a HiveOs version with already something in it .
2FA should be activated on every thing you use if its have to do with Money , Coins , Accounts that are important.
Downloaded from official page - https://hiveos.farm/ after that I downloaded Etcher setup, GOMplayer and COD:Warzone Or what you have downloaded after you have installed it , possible you got some kind of malware with one of the downloads ,
or you downloaded a HiveOs version with already something in it .
2FA should be activated on every thing you use if its have to do with Money , Coins , Accounts that are important.
Hackers probably doing bruteforce passwords on new accounts without 2FA, my password was easy to unlock 6 letters and 2 numbers...