Remove Neptun Tab
Neptun Tab is an intrusive piece of software for Windows. It behaves like a browser hijacker, and usually ends up being installed as an extension for your Web browser. There are several ways to end up with Neptun Tab on your system, but the most common one involves software bundles. This means that when you download a software installer from a random site, it might try to sneak additional apps, like Neptun Tab, onto your computer. To avoid this, you should always check out installation instructions carefully, and make sure to revoke any optional utilities.
The Neptun Tab software is meant to replace your browser's search engine and new tab page with an alternative website. It typically hosts a low-quality search service, which claims to be better, because it also hosts some widgets. The latter may display the weather, time, etc. However, these are features that you do not really need to see in your new tab page or search engine. Furthermore, Neptun Tab may provide low-quality search results, show extra ads, and redirect you to non-trustworthy websites.
If your new tab page is redirecting you to Search.neptuntab.com, then the Neptun Tab add-on is responsible for this. The best thing to do in this scenario is to run an up-to-date security scanner, which will identify and remove all of this browser hijacker's components.