Arletrewhasi.pro hijacker may be to blame for the modifications made to your browser, and it could have infected through freeware bundles. The threat was possibly adjoined to a freeware as an extra offer, and because you did not untick it, it installed. If you wish to prevent these types of annoying threats, you ought to pay attention to what you install. Arletrewhasi.pro isn't a high-level infection but its activity will get on your nerves. For one, they modify browser's settings so that the websites they're promoting are set as your home website and new tabs. It will alter your search engine, which may insert advertisement content among the legitimate results. This is done so that the hijacker could redirect you to sponsored sites, and the owners of those sites can earn income from traffic and advertisements. Some browser hijacker are able to reroute to malicious web pages so unless you wish to get your operating system contaminated with malware, you need to be careful. Malicious software is a much more serious contamination and it could bring about more dire consequences. Hijackers like to pretend they have useful features but you could find trustworthy extensions doing the same thing, which will not redirect you to random malicious software. More customized content will also start appearing, and if you are wondering why, the redirect virus is overseeing what your browse, so that it can know about your interests. In addition, problematic third-parties may be given access to that information. Thus, you are advised to erase Arletrewhasi.pro, before it could affect your system more seriously.
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