CompTIA A+ Core 2 (220-1202)Software TroubleshootingMedium
A client reports that whenever they open their web browser, it redirects to unfamiliar search pages, and a new toolbar has appeared that they did not install. Which of the following is the MOST likely cause?
- AA malicious browser extension
- BA corrupted DNS cache only
- CA failing hard drive
- DAn expired SSL certificate
Show answer & explanationAnswer & explanation
Correct answer: A. A malicious browser extension
Unwanted toolbars and browser redirects are classic symptoms of a malicious or unwanted browser extension (often bundled with free software) that hijacks search settings and homepage behavior.
Why the other options are wrong
- B. A DNS cache issue alone would not add a toolbar to the browser.
- C. A failing hard drive would cause performance or data issues, not targeted browser redirects.
- D. An expired SSL certificate would cause certificate warnings, not redirects or toolbars.
Browser Hijacker
Unwanted software, often installed as a browser extension or toolbar, that changes browser settings such as the homepage or default search engine without user consent.
- Often bundled with free downloaded software.
- Removed via browser's extension/add-on manager.
- Resetting browser settings to default can also remove hijacker configurations.
Memory trick: 'Toolbar Trouble = Rogue Extension'