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!

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

VCRUNTIME140.1.dll not found

  • 1 balasan
  • 1 ada masalah ini
  • 10 paparan
  • Balasan terakhir oleh FredMcD

more options

Hello, I keep having the same problem over and over again. That is getting a system error message which states "code execution cannot proceed because VCRUNTIME140.1.dll was not found." I have already uninstalled and reinstalled FF multiple times to no avail. I also deleted the program files as well. Thanks for any assistance screenshot available

Hello, I keep having the same problem over and over again. That is getting a system error message which states "code execution cannot proceed because VCRUNTIME140.1.dll was not found." I have already uninstalled and reinstalled FF multiple times to no avail. I also deleted the program files as well. Thanks for any assistance screenshot available

All Replies (1)

more options

You can check for issues caused by a corrupted or incomplete Visual C++ installation that is missing runtime components (Redistributable Packages) required by Firefox, especially VCRUNTIME140_1.dll.

Install both 32-bit and 64-bit "Visual Studio 2015, 2017 and 2019" downloads, (x86: vc_redist.x86.exe and x64: vc_redist.x64.exe) from https://support.microsoft.com/help/2977003/the-latest-supported-visual-c-downloads

You may not need the latter (32-bit version) if you use 64-bit Firefox. You may have to reboot the computer. ++++++++++++++++++++++++++++++++++++++++++++++ In another thread, a user reported that a recent update of Malwarebytes Anti-Exploit (version 415) may be causing symptoms similar to the VC Runtime problem. If you have MBAE, it should have a setting to exempt Firefox. You could test whether that makes any difference.