Tapufind is a browser extension that sets http://search.tapufind.com/ as your startup page and search engine. If this happened, then your system is infected with a browser hijacker. A browser hijacker is distributed with the help of freeware (bundling).
Okaytab.com is a questionable search domain claiming to enhance user’s browsing experience. In fact, it turns out to be exactly the other way around. A browser hijacker sets http://okaytab.com/ page as browser’s homepage and default search engine, displays a huge amount of intrusive ads, and makes you visit specific sites via redirects.
Package Tracker Pro is a questionable browser extension that simplifies the process of tracking parcels. It might seem useful at first sight, but, in fact, Package Tracker Pro is yet another browser hijacker. A browser hijacker is capable of changing system and browser configurations without user’s permission.
Safesear.ch may appear on your browser instead of default search engine due to browser hijacker impact. Even though it looks like other popular search engines, Safesear.ch was created not for searching but for advertising. A browser hijacker may collect users’ personal data and transfer them to third-parties in order to display advertisement based on interests.
If you are constantly seeing a pop-up window with Wellhello.com, then you picked up an adware. As a rule, adware gets on your computer along with free programs and is installed automatically without notice. Initially, it makes changes to the System Registry and then to browser configuration to make new tabs pop up from time to time.