PortaldoSites.com is a website that you are redirected to when you are infected with PortaldoSites.com browser hijacker. This computer infection is very similar to Qvo6 Virus and you can expect almost identical behavior from these two threats. Just like the other infection PortaldoSites.com is not a computer virus per se, but it can be used as a way to distribute malware or to expose you to possible malware infections, so if you find yourself being constantly redirected to PortaldoSites.com, you should run a full system scan with SpyHunter free scanner to detect any dangerous files, and then remove them for good.
The cunning thing about PortaldoSites.com is that this website really looks like a decent search engine. It even allows you to choose from more than 10 languages to customize your search engine in Japanese, Chinese, Hebrew, Polish, Russian, Thai and so on. However, if you try to perform a search on this website, you will that you are redirected to Yahoo! search engine no matter which function you try - Web, Image or Video search. Also, this tailored search exposes you to a number of featured links that may not be exactly what you were looking for. What is more, it is rather hard to tell apart advertisements and real search results in PortaldoSites.com, because the ads captions are presented in a very small font.
When you have this browser hijacker in your system, your home page and your search engine are changed to PortaldoSites.com. It is a default browser hijacker behavior. On top of that, PortaldoSites.com collects personal information whenever you make use of this search engine. The site's privacy page claims, that no vital information is collected by PortaldoSites.com (supposedly it only collects system information such as your IP address, your browsing information, your browser and platform type), but if this information gets leaked to a third party, it may as well use it for marketing purposes or worse - to infect you with malware.
Therefore, you should invest in a powerful antimalware program and terminate PortaldoSites.com right now. Take note that sometimes even after malware removal your default browser settings are not restored, so to do that, follow the instructions below:
Eventually, run a full system scan with SpyHunter scanner again, to see whether you really deleted every single suspicious file.