Answer Wiki. An MRI is a series of detailed picture of your brain, as they were at the time the MRI was done. They are valid as long as no other changes occur. Basically, if somebody has an MRI today that is normal, and have a stroke or hernia tomorrow, obviously the result will change (You never know).
Web browser. A web browser (commonly referred to as a browser) is a software application for retrieving, presenting and traversing information resources on the World Wide Web. An information resource is identified by a Uniform Resource Identifier (URI/URL) that may be a web page, image, video or other piece of content.
Browser hijacker A type of malware that alters your computer's browser settings so that you are redirected to websites that you had no intention of visiting. Most browser hijackers alter browser home pages, search pages, search results, error message pages, or other browser content with unexpected or unwanted content.