While assisting a user with their workstation, you notice that the browser fails to navigate to common websites and instead redirects to unfamiliar sites filled with advertisements. Additionally, the user complains of frequent pop-up ads that occur even when the browser is not in use. Upon checking the installed programs, you discover several unfamiliar applications that the user does not recall installing. What is the BEST course of action to address this problem?
Uninstall all applications the user does not recognize
Disable all browser extensions
Update the browser to the latest version
Perform a scan for adware and potentially unwanted programs (PUPs)