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

Lolu chungechunge lwabekwa kunqolobane. Uyacelwa ubuze umbuzo omusha uma udinga usizo.

Error due to updates?

  • 1 baphendule
  • 2 zinale nkinga
  • 4 views
  • Igcine ukuphendulwa ngu AnonymousUser

more options

Firefox was working fine. A dialogue box appeared after an unrelated restart to say firefox was downloading updates after which I could not open firefox and got the following error: firefox.exe - Bad Image The application or DLL C:\Program Files\Mozilla Firefox\xul.dll is not a valid Windows image. Please check this against your installation diskette.

Was this due to updates? Do I really need to do a clean reinstall? How do I get my bookmarks back if I do?

This happened

Every time Firefox opened

User Agent

Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)

Firefox was working fine. A dialogue box appeared after an unrelated restart to say firefox was downloading updates after which I could not open firefox and got the following error: firefox.exe - Bad Image The application or DLL C:\Program Files\Mozilla Firefox\xul.dll is not a valid Windows image. Please check this against your installation diskette. Was this due to updates? Do I really need to do a clean reinstall? How do I get my bookmarks back if I do? == This happened == Every time Firefox opened == User Agent == Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)

All Replies (1)

more options

Might it be your hard disk is full? See this thread for possible solutions