You might have unwanted software or malware installed on your computer if you experience:
- Pop-up ads and new tabs that won't go away
- Your Chrome homepage or search engine keeps changing without your permission
- Unwanted Chrome extensions or toolbars keep coming back
- Your browsing is hijacked, and redirects to unfamiliar pages or ads
- Alerts about a virus or an infected device
Tips:
- Use Safe Browsing in Chrome
- Avoid malware in the future
- Learn how to block or allow pop-ups in Chrome
Change your default ads permissions
- On your computer, open Chrome.
- At the top right, click More
Settings
- Click Site settings
- Select the option you want as your default setting.
Remove unwanted programs on your Mac
Before you reset your browser settings on your Mac, check your computer for unwanted programs.
You can remove malware and other programs on your computer that you don't remember installing.
- Open Finder.
- On the left, select Applications.
- Right-click any unwanted programs or programs that you don't recognize.
- Select Move to Trash.
- At the bottom, right-click Trash.
- Select Empty Trash.
Reset your browser settings
- On your computer, open Chrome.
- At the top right, select More
- Select Reset settings
If you reset your browser settings, you have to turn some extensions on. To turn extensions on, at the top right, select More 
If the steps above don't work, go to the Chrome Help Forum.
Tip: If you’re a website owner, learn how to resolve malware or unwanted software issues related to your downloads.
More info about malware
How to spot malware (video, 1:42)Three tips for spotting malware (1:42)
Learn what to look for when you have malware on your computer and how to stay safe online.
- Beware of sites that may cause you to download unwanted software. For example, if you win a contest or get copyrighted content at no charge.
- Beware of encrypted archives, like .zip files with a password required, that may bypass antivirus detection scans.
- Beware of warnings about viruses or infected devices, especially if you haven’t recently used a virus scanner.
- Avoid insecure connections when you visit sites and don’t download files from sites that don’t start with HTTPS. Learn how to check if a site's connection is secure.
- Pay attention to Safe Browsing download warnings. To avoid antivirus detections, malicious actors may ask you to turn off or ignore warnings.
- If a popup about a program update or download seems suspicious, don't click on it. Instead, go to the program's official website to download it.