I confirm that inability to disable "Computer scan has been started" bubble balloon tips via ESET advanced notification settings is annoying. Every time time any removable medium is inserted and automatic scan is started, balloon tip is shown. I understand that it informs user, because scanning will consume some system resources, but user should be given an opportunity to choose if she/he want to be informed or not. Older ESET products had an option to disable balloon tips:
But ESET Smart Security 6 and 7 lack this option.
However, there is a work around if one wants to remove those annoying balloon tips. ESET balloon tips can be removed from Windows. On Windows 7, in system tray click Customize... and for ESET product choose Hide icon and notifications.
In this link, ESET user also complained about the removal of ability to disable balloon tips: hxxp://www.wilderssecurity.com/threads/disable-balloon-notifications-upon-disabling-realtime-protection.343771/
ESET team, please bring back option to disable balloon tips.