If you though Pop-ups were annoying, just wait until your web browser is hijacked!
A browser hijacker is a form of malware or spyware that takes part or all of your controll while using your browser.
You can catch a browser hijacker by visiting a web page infected.
A browser hijacker may replace the existing internet browser home page, error page, or search page with its own.
Morwill Search is a browser hijacker. It first redirects homepages to its website and begins to collect information on the computer.
CoolWebSearch (CWS) was one of the first browser hijackers. It redirected the existing home page to the rogue CWS search engine, with its results as sponsored links. With most antivirus and antispyware programs unable to properly remove this particular hijacker, a man named Merijn Bellekom developed a special tool called CWShredder specifically to remove this hijacker. CoolWebSearch has since become a well known general name for any browser hijacker.
What's a browser Hijacker?
This term covers a range of malicious software. The most generally accepted description for browser hijacking software is external code that changes your Internet Explorer settings. Generally your home page will be changed and new favourites will be added that point to sites of dubious content. In most cases, the hijacker will have made registry changes to your system, causing the home page to revert back to the unwanted destination even if you change it manually.
A browser Hijacker may also disallow access to certain web pages, for example the site of an anti-spyware software manufacturer like Lavasoft. These programs have also been known to disable Antivirus and anti-spyware software.