Chrome is an excellent, fast browser, and the browser used by more people than any other. As with all software, though, things can go wrong. Settings can become corrupted, or you may install an extension that has subsequently been identified as being malware.
Probably the most powerful tool to help clean up a Chrome installation is something called the Chrome Cleanup Tool. It's an official Google release and is free of charge. It's a download of around 3 MB. The program is malware-free according to VirusTotal and Web of Trust.
Although the cleanup tool is very useful, do take heed of the warning screen when you run it. It will clear various settings, including your home page, so don't use it until you actually have a real problem.
Link to Chrome Cleanup Tool Download
[Courtesy of Gizmo Freeware]