Hi,

I have been experiencing lots of alert from Norton, everytime I am using the Opera Browser. It started last week, when my opera crashed. Maybe I click in some bad link. Since then, Norton keep me showing the following alert:

Description
19/06/2015 20:35:06,High,An intrusion attempt by sepabi.com was blocked.,Blocked,No Action Required,Web Attack : Malvertisement Website Redirect 9,No Action Required,No Action Required,"sepabi.com (88.85.84.123, 80)",sepabi.com/935q498cfh78hsq9epekba7jwuus7ewcz5vmd6rev,"my computer name and IP",88.85.84.123 (88.85.84.123),"TCP, www-http"
Network traffic from sepabi.com/935q498cfh78hsq9epekba7jwuus7ewcz5vmd6rev matches the signature of a known attack.

I already uninstalled opera, deleted files from the opera folder. But everytime I install opera, the alert begins again. I don't experience the same alert using any other browser, like Firefox, Chrome, IE.

Any ideas how can I get rid of this alert and possible malware?