Vosteran.com by VosteranSearch.com is browser hijacker that originates from Israel, and can hijack in 3 major browsers (Google Chrome, Mozilla Firefox and Internet Explorer). In particular, Vosteran.com replaces default search and homepage of all your browsers to vosteran.com. And in some case it hijacks browsers shortcuts.
PrizeCoupon is malicious browser add-on designed for Internet Explorer, Google Chrome and Mozilla Firefox browsers. It was created to display drop-down coupon window on shopping sites while you view certain item, and show you possible discounts. It may be good for some people, however there are much better and trusted analogues.
System-32alert.com is domain name that is used by different advertising networks to display advertising in browsers. Usually System-32alert.com pop-ups promote support phone numbers like 800-808-58-17 saying that "Your computer may not be protected". On this phone number people will impose you expensive services or software.
Ads.ads-ki.com is domain name that is used by different advertising networks to display advertising in browsers. Usually Ads.ads-ki.com pop-ups promote fake Flash Player or Java update. Downloading something from this website is not recommended as it can result adware infection.
CoolnCheap by WebPick Internet Holdings Ltd. is unwanted ad-supported browser extension for Internet Explorer, Google Chrome and Mozilla Firefox browsers. It is promoted as add-on to search for discounts and deals on shopping sites. However it displays irrelevant ads on non-shopping sites as well. For example you can see "Ads by CoolnCheap" or "Powered by CoolnCheap" ad banners on Google homepage.
BoBrowser by ClaraLabs is potentially unwanted program. It is chromium-based browser that replaces Chrome as default browser on your computer. It has pre-installed adware inside and default search engine and homepage isearch.bobrowser.com. It can also set such webpage as default in Mozilla Firefox and Internet Explorer browsers.