This article will guide you through the troubleshooting steps we go through ourselves. Then it will direct you to the solutions we've found. Start where we do:
- Make sure the ads are legitimate third-party advertising, not ads illicitly inserted by malware.
- If the ads are legitimate, check for the things that most often interfere with ad blocking.
Step 1. Are the ads caused by malware?
If you see the same ads on every website or your search page has been changed, your computer is probably infected by a form of malware called "adware." Learn more about adware.
Ad blockers can't block this kind of advertising. The only way to remove the ads is to remove the adware that's causing them. So the first step in troubleshooting unblocked ads is to scan your computer for malware, even if you have a Mac.
You can use any free anti-malware application. We recommend Malwarebytes Anti-Malware Free. In our experience, their software tends to find malware that others miss. Then continue to instructions for removing malware from your computer.
If you're seeing the exact same group of similar-looking ads on every website, then your computer has been infected by a form of malicious software called "adware." If your browser's search page has been changed to a page with ads, that's a symptom of another type of malware known as a "browser redirect virus."
Here are some examples of the kinds of malware we often see.
This is adware, malware that injects ads into web pages. Look for clues such as a group of similar ads with words like the ones we have circled in red. Other examples are "Related Deals," "Shopping Deals," "Great Deals," and "Similar Deals." (Do you see a pattern emerging here?)
This is an example of a browser redirect virus. This type of malware "hijacks" your browser's default search page, driving traffic to the malware developer's site or redirecting your searches to websites where they’ll receive a commission or other revenue. The clues here are the site name in the address bar, the logo in the upper right corner of the page, and of course, the page full of ads.
This is an example of a pop-up ad you would see if you clicked a link on a redirected search page. We know this is malware because 1) the ad popped up when we clicked a link, and 2) the pop-up has the words "powered by." "Powered by," "brought by," or just "by" followed by a name are a really big clue that you're looking at malware.
Another form of adware is the full-page pop-up, an ad that opens a new tab without your consent. This one even has its own pop-up ad!
Step 2. Check for common problems
If you see one or two ads on one website, it's probably a legitimate ad that slipped through your ad blocker.
In no particular order, here are the most common reasons legitimate ads aren't blocked:
- Whitelisting (accidental or on purpose): You may have told AdBlock not to block ads on a page or site.
- Incognito browsing: You may be using incognito mode or a private browsing window.
- Circumvention: Advertising technology companies have found ways to sneak their ads past ad blockers.
- Acceptable Ads: Because we understand that, like it or not, ads are still the primary source of funding for websites, AdBlock allows some non-intrusive advertising to appear unless you turn this setting off. We tell you this and give you the opportunity to turn it off on the donation page that appears after you install AdBlock. If you closed that page without reading it, you may not realize that some unobtrusive ads aren't blocked automatically.
- Filter lists: Your filter lists may be out of date or you may not be subscribed to the right filter lists for the website you're visiting.
If this list feels a little overwhelming, we have troubleshooting guidance that may be easier to follow. You can also give that guidance a try if the suggestions above didn't eliminate the ads.