Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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 got a Firefox alert My PC may have a serious virus! Is this legitimate

  • 2 پاسخ
  • 1 has this problem
  • 7 views
  • آخرین پاسخ توسّط FredMcD

more options

I got the following message on my computer screen, is it legitimate, should I respond to it or ignore it?.

Firefox-Alert! Warning: Your PC may have a serious virus! Browser: Firefox 34.0 OS: Windows If you are seeing this message you need to call Windows Support XXX (TOLL FREE) immediately. Technicians are awaiting for you call for FREE DIAGNOSIS & PRIORITY assistance removing malicious viruses from your PC.

browser.hijacker.spy/trojan.fakeAV-download

Help! Please respond if such message is legitimate or I should Ignore it. Thank you.

edit: removed fake hotline number. (philipp)

I got the following message on my computer screen, is it legitimate, should I respond to it or ignore it?. Firefox-Alert! Warning: Your PC may have a serious virus! Browser: Firefox 34.0 OS: Windows If you are seeing this message you need to call Windows Support XXX (TOLL FREE) immediately. Technicians are awaiting for you call for FREE DIAGNOSIS & PRIORITY assistance removing malicious viruses from your PC. browser.hijacker.spy/trojan.fakeAV-download Help! Please respond if such message is legitimate or I should Ignore it. Thank you. <sub>edit: removed fake hotline number. (philipp)</sub>

Modified by philipp

All Replies (2)

more options

Please scan your computer for Malware. Sometimes a problem with Firefox may be a result of malware installed on your computer, that you may not be aware of.

You can try these free programs to scan for malware, which work with your existing antivirus software:

Microsoft Security Essentials is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one.

Further information can be found in the Troubleshoot Firefox issues caused by malware article.

Did this fix your problems? Please report back to us!

more options

. Whenever you get a message / popup that says something like that;

DO NOT USE ANY OF THE PROVIDED LINKS

It could also be Malware or a Virus.