Important Notice: We're experiencing email notification issues. If you've posted a question in the community forums recently, please check your profile manually for responses while we're working to fix this.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

I get the message, "system infected: Adware Activity 2" using Firefox, but not using Explorer. Any ideas?

  • 1 reply
  • 1 has this problem
  • 1 view
  • Last reply by philipp

more options

The above message is from Symantic Endpoint Protection. I have run virus scans 2 x and I have removed Firefox, then re-downloaded and re-installed. THe message persists.

The above message is from Symantic Endpoint Protection. I have run virus scans 2 x and I have removed Firefox, then re-downloaded and re-installed. THe message persists.

Chosen solution

hello, you may have malicious addons present. please perform all these steps:

  1. reset firefox (this will keep your bookmarks and passwords)
  2. afterwards go to the firefox menu ≡ > addons > extensions and in case there are still extensions listed there, disable them.
  3. finally run a full scan of your system with different security tools like the free version of malwarebytes and adwcleaner, as they are specialised in adware which common anti-virus software might not even detect as threats.

Troubleshoot Firefox issues caused by malware

Read this answer in context 👍 2

All Replies (1)

more options

Chosen Solution

hello, you may have malicious addons present. please perform all these steps:

  1. reset firefox (this will keep your bookmarks and passwords)
  2. afterwards go to the firefox menu ≡ > addons > extensions and in case there are still extensions listed there, disable them.
  3. finally run a full scan of your system with different security tools like the free version of malwarebytes and adwcleaner, as they are specialised in adware which common anti-virus software might not even detect as threats.

Troubleshoot Firefox issues caused by malware