A browser hijacker is a type of malicious software that can alter the way a user’s browser functions. It can change the homepage, search engine, and other settings without the user’s consent. It can also install unwanted extensions or toolbars, and collect sensitive information such as login credentials or credit card numbers.

Browser hijackers can be spread through various means, including:

* Visiting infected websites
* Downloading software from untrusted sources
* Opening email attachments or clicking on links from unknown senders

Once a browser hijacker is installed, it can cause a variety of problems, including:

* Slowing down the browser
* Displaying unwanted ads or pop-ups
* Collecting personal information
* Installing additional malware