National Security Bureau ransomware is another disaster to many computer users who becomes a victim of this virus. The protocol of this malware is to lock someone’s PC and leave an alert that your computer has been blocked! You are accused of illegal activities, which can be the use of illicit files, or use of unlicensed software.
Remove Contoso.com (Contoso Search)
Even if Contoso.com does not belong to any viruses, this browser hijacker can completely ruin your online activity. It is capable of taking over your web browser’s default search engine.