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won't work at all

  • 2 replies
  • 1 has this problem
  • 10 views
  • Last reply by FredMcD

jackhsimons
jackhsimons
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Firefox stopped working. I have uninstalled and downloaded numerous times. It still doesn't work. In the new install I get a warning box telling me that vcruntime140_1.dll is not functioning or something. Another item: A box tells me to turn off Firefox -- after I have uninstalled Firefox. The program opens and remains totally inert. I spent hours last night and finally it worked -- wonderful. This morning nothing worked. Uninstall -- install ad nauseum. Nothing works. I am writing you.

Jack Simons

Firefox stopped working. I have uninstalled and downloaded numerous times. It still doesn't work. In the new install I get a warning box telling me that vcruntime140_1.dll is not functioning or something. Another item: A box tells me to turn off Firefox -- after I have uninstalled Firefox. The program opens and remains totally inert. I spent hours last night and finally it worked -- wonderful. This morning nothing worked. Uninstall -- install ad nauseum. Nothing works. I am writing you. Jack Simons

Chosen solution

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.

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All Replies (2)

Bithiah
Bithiah
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Hey there!

You may have done this already, but please can you restart Firefox (this isn't installing and installing Firefox) which should resolve this issue.

FredMcD
FredMcD
more options

Chosen Solution

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.