https://www.dotnetzone.gr:443/cs/blogs/birbilis/archive/2014/05/14/fix-how-to-remove-trovigo-com-searchprotect-restore-internet-options.aspxTrovigo.com is an unwanted search engine hijacker that renders Internet Options of Windows / Internet Explorer inaccessible. To restore them on an older Windows XP installation, one way that I’ve found to work is to update Internet Explorer to aelCommunityServer 2.1 SP3 (Build: 20423.1)