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.

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

Firefox will not load - missing VCRUNTIME140_1.dll

  • 3 replies
  • 3 have this problem
  • 8 views
  • Last reply by cor-el

tjadlib8
tjadlib8
more options

Firefox not loading and missing VCRUNTIME140_1.dll preventing re-installation. Full message is: 'The code execution cannot proceed because VCRUNTIME140_1.dll was not found. Reinstalling the program may fix this problem.' Tried to install an old version of Firefox (28.0) but this is not upgradeable.

tjadlib8@gmail.com

Firefox not loading and missing VCRUNTIME140_1.dll preventing re-installation. Full message is: 'The code execution cannot proceed because VCRUNTIME140_1.dll was not found. Reinstalling the program may fix this problem.' Tried to install an old version of Firefox (28.0) but this is not upgradeable. tjadlib8@gmail.com

All Replies (3)

TyDraniu
TyDraniu
  • Top 10 Contributor
more options
  1. Enter this link: https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads
  2. From the section Visual Studio 2015, 2017, 2019 and 2022 download the following executable file: vc_redist.x64.exe
  3. Install this file
  4. Restart the computer and run Firefox
Jadams
Jadams
more options

Thank you so much. This resolved my issue. I was about to restore my PC to a restore point, which I really didn't want to do and something told me to check mozilla support. I'm glad I did. Thank you again.

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

Note that this can happen if you recently uninstalled an application that was using Visual C+ runtime components. Firefox doesn't come with these files and expect they are installed, but doesn't increment its install counter what causes Windows to silently remove those VCR Redistributable Packages when other applications are uninstalled and the counter reaches zero.