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Firefox is not opening


Hi, I had been using Firefox since many years, but recently I am facing problem with this. When ever I try to open Firefox I get a message saying "The application or DLL c:\Program Files\Mozilla Firefox\MOZCRT19.dll is not a valid Windows image. Pleas check thsis against your installation diskette." and Firefox crashes automatically.

I could not use Firefox now, please help me. I feel comfortable working with firefox.

Awaiting your quick response.

Thaks & Regards, Dinesh

Additional System Details

Installed Plug-ins

  • Default Plug-in
  • Shockwave Flash 10.1 r85
  • Windows Presentation Foundation (WPF) plug-in for Mozilla browsers
  • 2,5,3,1
  • Java Plug-in 1.5.0_15 for Netscape Navigator (DLL Helper)
  • Adobe PDF Plug-In For Firefox and Netscape "9.4.0"
  • Npdsplay dll
  • DRM Store Netscape Plugin
  • DRM Netscape Network Object


  • User Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv: Gecko/20100723 Epic/1.1 Firefox/3.6.7

More Information

  • Moderator
1041 solutions 8840 answers

Helpful Reply

Since a file in the installation appears to be corrupt, try performing a clean re-install

  1. Download the latest version of Firefox from http://www.mozilla.com/
  2. Uninstall Firefox, but do not select the setting "Remove my Firefox personal data and customizations"
  3. Delete the Firefox Installation directory, default location on 32 bit Windows is C:\Program Files\Mozilla Firefox\
  4. Re-install Firefox

The above process does not delete the bookmarks, passwords and other user data. To be safe you can back them up first, for details see http://kb.mozillazine.org/Profile_backup

Modified by TonyE