Welcome to the Security Center Forum,
It appears that your computer is infected with a potentially unwanted program, or PUP, that has replaced your browser settings with a tabcool search engine.
Removing this infection from your computer is not a problem.
Please follow the guide on this webpage to remove the infection from your computer and recover your previous browser settings:
If you have any questions about the removal process please feel free to reply to this thread. If the recommended software was able to remove the infection but you still fall victim to unwanted redirects please view the manual removal guides below:
- How to change your Google Chrome homepage
- How to change your Google Chrome search engine
- How to remove extensions from Chrome
- How to change your Mozilla Firefox homepage
- How to change your Mozilla Firefox search engine
- How to remove add-ons from Firefox