Homepage/search engine changed; new tab opens to a strange site
Extra ads, pop-ups, and random redirects
A toolbar or extension you don’t remember installing
Slower browsing and higher data use
Bundled with “free” installers or fake updates
Rogue extensions from untrusted sources
Drive-by downloads and deceptive ads
Remove unknown extensions and reset the browser to defaults.
Uninstall suspicious apps; then reboot.
Run a full anti-malware scan to clean leftovers.
Check DNS/proxy settings and set back to automatic if changed.
Install apps/extensions only from official stores.
Choose Custom install and deselect extra offers.
Keep your browser and OS updated; use real-time protection.
Be cautious with “free” codecs, PDF viewers, and cracks.