If you notice that the search engine and homepage of your webservers have been changed to Safesearchprotect.com, then most likely your computer is infected with a Safesearchprotect.com browser hijacker. As mentioned above, this changes the settings of Chrome, IE, Mozilla and other browsers installed in your Windows. Outwardly it looks like a legitimate search engine, similar to Searchincognito.me described earlier.
Developers position Searchincognito.me as a legitimate search engine with the ability to search in incognito mode. In addition, they argue that their search engine has the usual functions of similar search pages, such as Google, Yahoo, Bing, and others, namely it increases the experience of browsing, searches efficiency and so on. Externally, too, Searchincognito.me does not cause any suspicion and seems familiar.
Simplysafesearch.com is potentially unwanted software, namely a browser hijacker, changing Google Chrome, Internet Explorer, Edge and other browsers in your OS. First of all, it sets http://simplysafesearch.com/ as a homepage and search engine by default, which looks quite legitimate.
If you find that http:/searchvaults.com/ has become homepage and the default search engine, then most likely it means that your browsers are infected with SearchVaults Search hijacker. This attacks all browsers installed on your system, such as Chrome, Mozilla, IE, and others.
Search-square.com, presented as BlaSearch is a typical browser hijacker, that implemented in most common browsers and starts to log users personal information without any legal basis. Some conditions of privacy policy paragraph determined that BlaSearch may collect personal information, including IP, information about all visited sites and type of browser, at various sessions when users visit http://search-square.com/ website or use BlaSearch plugin.