What Is Catstart.com?
If your browser’s start page or default search engine have been changed to https://catstart.com, and you cannot alter them to something else, then you have a browser hijacker on your computer. A browser hijacker is a piece of software (a browser extension, usually) that can change default search, homepage and similar settings to make users repeatedly visit certain sites. Browser hijackers are mainly distributed by bundling with software on free downloading websites. You may follow this step-by-step guide to get rid of the browser hijacker and remove Catstart.com from your browser.