The Answer: C. Run a malware removal utility If the results page of one website is unexpectedly directing to a different site, then the browser has most likely been hijacked by malware. Running a malware removal tool would be the best option of the available choices.
The incorrect answers:
A. Run the search from Safe Mode If malware has infected the system and hijacked the browser, then operating the same browser from Safe Mode would result in the same hijacked page result.
B. Install the latest operating system patches Operating system patches would not commonly remove a malware infection, so the redirection would continue to occur after the OS update.
D. Login as a different user The malware that infected the current user's browser is most likely associated with all users on the system. Authenticating as a different user would not provide any resolution to this browser hijack