You seriously need to stop using public computers Gerrit to login to your accounts and manage your domains.
Because virtually all of those computers are infested with malware, they are prime targets as a lot of tourists, etc use it to login to personal stuff.
There is no privacy when you use a public computer - assume everything you do can be seen by anybody - anybody will gain access to whatever you do.
If you're really paranoid - buy a separate new computer and only use it to login to your domains related accounts/finance and do what you need to do and then unplug from the internet!
And of course still have your firewall installed and AV package(s) installed, do your homework to see which ones are compatible with each other, not all are.
And don't use WIFI or other wireless connection.
For all other stuff use another computer.