Firefox 技術支援討論區

Following a Windows 10 update, I tried to open Firefox and the following popup message appeared. "the code execution cannot proceed because VCRUNTIME140_1.dll was not found. Reinstalling the program may fix this problem." I have tried several times to download the latest version of Firefox, but during it's installation the same error message appears. How can I fix this problem and get Firefox to work normally.

Hi, I can't install Firefox and I don't know what's going on here.

Yesterday I installed the latest version of Firefox and it worked fine. Then, I turned off the laptop and the next day when I was going to use Firefox, it didn't load any pages. Edge was working fine, Chrome was working fine, but Firefox was not working. Trying to fix the problem, I decided to uninstall Firefox and installing it again. In order to clean even more the previous installation, I even manually deleted the C:\Program Files\Mozilla Firefox folder to remove all possible traces. I restarted the laptop and downloaded again the Firefox installer. I don't know how, but the installer detected that I had already installed Firefox before. I unchecked restart Firefox and hit the button to continue with the installation. After this, was impossible to install Firefox again. I got a message saying that the installation cannot continue because the VCRUNTIME140_1.dll was not found. The message said that this problem can be fixed by reinstalling the program, but that is not true, everytime I try to reinstall it, I get again the VCRUNTIME140_1.dll error.

After this, the installation stops and the Firefox icon appears on the desktop, but it doesn't install properly the software and when I open it, I cannot browse the Internet.

Do you know what's going on here and how to solve this?

Cheers

I got a new Lenovo Laptop and cant get Firefox to load a webpage. Here's what happens and what I've done 1. I install Firefox and during install get error below, VCRUNTIME140_1.dll Not Found. I then click OK and Firefox Installs but when I load it no webpages will come up just a black screen no indications it is even trying to load the page, no error message. It does nothing. Cant even open Google.com 2. I looked in MS forums and they say to install Visual C++. Did every x86 and X64 version I could find. Still have the problem even after uninstalling Firefox and reboot. 3 Have McAfee, and took Firefox off the Safe list then put it back on. 4. Went to try and find the file but can't on a reputable website. So I looked for this file on my Dell Laptop and Asus Desktop. Both have Firefox installed and it works fine. Get this, NONE of my other two computers have that exact file name anywhere. VCRUNTIME140_1.DLL! They have 140.DLL and a few other 140.dll with different variation but no 140_1.dll? So how does Firefox run on 2 other computers without this DLL but not on this new one? They are all Windows 10 Would appreciate any help. Seems to be a Firefox or Lenovo Issue just not sure. If anyone know how to get the DLL from MS let me know.

How do I fix this? Firefox won't start (it did a few days ago).

Version 87 running on Windows 10.

Error Msg: The code execution cannot proceed because VCRUNTIME140_1.dll was not found.

There is a file: VCRUNTIME140.dll in the C:\Program Files\Mozilla Firefox folder.

I reinstalled Firefox but that didn't help.

Bonjour, Suite à la dernière mise à jour de Firefox, j'ai sans cesse le message d'erreur VCRUNTIME140_1.dll introuvable. Conseil de réinstallation de l'application etc. J'ai beau faire une désinstallation complète et un nettoyage puis une réinstallation, rien n'y fait. J'ai toujours le même message depuis plusieurs jours. Et c'est énervant ! Je suis obligé de naviguer sur Edge et je n'aime pas du tout. Merci de m'aider. Bonne journée. Philippe

PC was running fine and firefox. Removed the office365 app that comes with win10 and now its no go. Reinstalled and no go. Done safe mode and no go. Removed all files and new install of firefox still no go.

So I have to say that may be office365 app has removed some important files that were shared. I haven't installed office365 as I use office pro 2010 which still works fine. Im used that snarky edge browser at the moment.

Any ideas?

I tried Mozilla VPN but it would never connect. So I uninstalled and cancelled. Then I got a persistent vcruntime140.dll not found error. I uninstalled iTunes and legacy Microsoft Visual Suite apps. Now nothing will load. Not about pages. Not password pages. Not websites. Nothing. Have uninstalled and refreshed Firefox multiple times. Have restarted PC multiple times. Have turned off firewall and virus protection. Nothing works. nothing loads. Thanks for your thoughts!

Widows 11...firefox not working... uninstalled and tried to re-install.. the install terminates prematurely with the message: The code execution cannot proceed because VCRUNTIME140_1.dll was not found......

Help!

web pages don't display but address is shown at tabs, can't see options but other menu options seem to be okay. I uninstalled and erased all related data (I could find) multiple times and reinstalled multiple times but problem remains. I tried refresh, safe mode, etc. At installation I get error VCRUNTIME140_1.dll not found, a susequent installation finishes without errors. I am sending this from another system because I can't use the problem unit for this post. The problem system is similar to this one. I am puzzled and seek help.

I try to install Firefox on a HP Z1 G8 desktop under Windows 11 Pro. The first time I get a warning that a .dll is not available or so (I dont know what this warning is precisely, becaus it pops up for 2 seconds only ) , and firefox is not well installed, reinstalling goes without warning, but still Firefox starts and then stay dead, no sites, no settings. I know the security in this computer is very thight, but other apps install without problem and functions.

Why Firefox cant be installed where other apps can ??????

who has experienced this also and has a clou ?? thanks Ferdinand

Firefox on a Windows 10 (Build 19042.1052) that

It starts and seems to run without hanging or crashing. I can enter an url, but it doesn't do anything. The Viewport just stays white. Also nothing happens if clicking on a bookmark. Or the settings. I was able to open the about:support page via the menu, but not by entering it into the adress bar.

Here are the things that I already tried to no avail: - updated to the latest version - Incognito mode - Troubleshoot mode - graphics card driver is up to date - reinstallation - Cleaning Firefox - delete firefox profile - clearing the start cache - downgrade to version 88.0.1

It is weird, that the about:support page works when opened from the menu but not when entered into the adress bar, right? This means that content can be displayed, but you cannot navigate to it via the address list. But then why don't bookmarks work either?

By the way: It is not a network Issue. Chrome and Edge work, and also the problem persists across multiple different networks.

New (to me) machine (Win10) came with 30 day McAfee installed. Uninstalled and it killed Firefox. Gave a missing file message at first so reinstalled Firefox. Now, no message, but Firefox opens with basically blank window and unresponsive.

Hello, Something strange happened during a recent Firefox update, not sure if it was something I did, or computer related, but now Firefox does not function. The browser will open but will not load any websites. Also, settings page will not open. If Firefox browser is closed and reopened a message is shown stating "Firefox is already running but is not responding. The old Firefox process must be closed to open a new window".

My troubleshooting actions: Installed/Uninstalled firefox several times, removed c:\ProgramData\Modzilla folder - status/functionality mentioned above does not change.

Windows running on target computer is completely updated and patched.

Thanks for assist, David

I am having issues with activation of an existing O365 subscription. After hours working with Microsoft Office support the issue is still not resolved.

That is seemingly unrelated to Firefox, yet when trying to resolve the issue I uninstalled O365 twice, I could not open Firefox. I received the error "VCRUNTIME140_1.dll was not found". After reinstalling O365, I was able to access Firefox but all of my bookmark folders are gone.

How do I recover those bookmark folders (with hundreds of bookmarks--if they're permanently gone, it will be a significant loss). AND why would uninstalling O365 affect Firefox?

Installation in German language under W10 Home 64bit. VCRUNTIME140_1.dll not found, installation interrupted. Firefox seems to be installed, but totally unresponsive (no files, no websites, not even parameters). Any known measures? Thanks!

I got a new PC and installed Firefox, synced with my account. Everything worked fine for a few days but then it became unresponsive, in the sense that it won't try to load any pages at all. I uninstalled it completely and did a refresh but it is still the same - attached is a screenshot of the brand new copy, where it won't even load the welcome info. Entering a URL and hitting Enter does nothing at all. It's totally unusable and I have no idea what else to try! Anyone have this issue?

Recently I have been unable to surf the web on my Firefox Browser. I have tried uninstalling and reinstalling it a few time to no avail. I have checked my Firewall settings and Firefox is not blocked. I know other browsers work as I am sending this through Edge.

I checked my event viewer and found that Firefox was being denied access (see attached pic). Any suggestions to get this resolved would be welcome.