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The procedure entry point ?DllBlocklist_Initialize@@YAXXZ could not be located in the dynamic link library C:\Program Files (x86)\Mozilla Firefox\firefox.exe

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Out of sudden I am getting this error message when I start fire fox

The procedure entry point ?DllBlocklist_Initialize@@YAXXZ could not be located in the dynamic link library C:\Program Files (x86)\Mozilla Firefox\firefox.exe

I tried reinstall, uninstall, reinstall, etc and it is not working out for me yet!

Out of sudden I am getting this error message when I start fire fox The procedure entry point ?DllBlocklist_Initialize@@YAXXZ could not be located in the dynamic link library C:\Program Files (x86)\Mozilla Firefox\firefox.exe I tried reinstall, uninstall, reinstall, etc and it is not working out for me yet!

Chosen solution

Since you run version 36 and looking at this question, what happens when you install version 36.0.1 if not using it already?

Additionally I’d think of running a System File Check (sfc.exe) as suggested there.

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  • User Agent: Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; WOW64; Trident/6.0; .NET4.0E; .NET4.0C; .NET CLR 3.5.30729; .NET CLR 2.0.50727; .NET CLR 3.0.30729)

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philipp
  • Top 25 Contributor
  • Moderator
5304 solutions 23418 answers

hi, that's unusual. next to the security software already in place, can you please run a scan with various other security tools like the free version of malwarebytes, adwcleaner & eset online one-time scanner and see if they come up with some stuff?

hi, that's unusual. next to the security software already in place, can you please run a scan with various other security tools like the [https://www.malwarebytes.org/antimalware/ free version of malwarebytes], [https://toolslib.net/downloads/viewdownload/1-adwcleaner/ adwcleaner] & [https://www.eset.com/online-scanner/ eset online one-time scanner] and see if they come up with some stuff?

Helpful Reply

almost 10 days and still same issue and i need mozilla urgently

almost 10 days and still same issue and i need mozilla urgently
FredMcD
  • Top 10 Contributor
4245 solutions 59390 answers

Let’s do a full clean re-install; Download Firefox For All languages And Systems {web link}

Save the file. Then Close Firefox.

Using your file browser, open the Programs Folder on your computer.

Windows: C:\Program Files C:\Program Files (x86)

Mac: Open the "Applications" folder. https://support.mozilla.org/en-US/kb/how-download-and-install-firefox-mac

Linux: Check your user manual. If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it. See Install Firefox on Linux; https://support.mozilla.org/en-US/kb/install-firefox-linux

If you downloaded and installed the binary package from the Firefox download page, simply remove the folder Firefox in your home directory. http://www.mozilla.org/firefox#desktop ++++++++++++++++++++++++++++ Do Not remove the profiles folder.

Look for, and rename any Mozilla or Firefox program folders by adding .old to them. Do not rename the Mozilla Thunderbird folder if there is one.

After rebooting the computer, run a registry scanner if you have one. Then run the installer. If all goes well, remove the OLD folders when you are done. +++++++++++++++++++++++++++ If there is a problem, start your Computer in safe mode and try again.

http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode This shows how to Start all Computers in Safe Mode; Free Online Encyclopedia

Let’s do a full clean re-install; [http://www.mozilla.org/en-US/firefox/all/ Download Firefox For All languages And Systems] {web link} Save the file. Then '''Close Firefox. ''' Using your file browser, open the '''Programs Folder''' on your computer. '''Windows: ''' C:\Program Files C:\Program Files (x86) '''Mac: ''' Open the "Applications" folder. https://support.mozilla.org/en-US/kb/how-download-and-install-firefox-mac '''Linux: ''' Check your user manual. If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it. See Install Firefox on Linux; https://support.mozilla.org/en-US/kb/install-firefox-linux If you downloaded and installed the binary package from the Firefox download page, simply remove the folder Firefox in your home directory. http://www.mozilla.org/firefox#desktop ++++++++++++++++++++++++++++ '''Do Not''' remove the profiles folder. Look for, and rename any '''Mozilla''' or '''Firefox''' program folders by adding .old to them. Do not rename the '''Mozilla Thunderbird''' folder if there is one. After rebooting the computer, run a registry scanner if you have one. Then run the installer. If all goes well, remove the OLD folders when you are done. +++++++++++++++++++++++++++ If there is a problem, start your '''Computer''' in safe mode and try again. http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode This shows how to Start all Computers in Safe Mode; Free Online Encyclopedia

Question owner

FredMcD said

Let’s do a full clean re-install; Download Firefox For All languages And Systems {web link} Save the file. Then Close Firefox. Using your file browser, open the Programs Folder on your computer. Windows: C:\Program Files C:\Program Files (x86) Mac: Open the "Applications" folder. https://support.mozilla.org/en-US/kb/how-download-and-install-firefox-mac Linux: Check your user manual. If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it. See Install Firefox on Linux; https://support.mozilla.org/en-US/kb/install-firefox-linux If you downloaded and installed the binary package from the Firefox download page, simply remove the folder Firefox in your home directory. http://www.mozilla.org/firefox#desktop ++++++++++++++++++++++++++++ Do Not remove the profiles folder. Look for, and rename any Mozilla or Firefox program folders by adding .old to them. Do not rename the Mozilla Thunderbird folder if there is one. After rebooting the computer, run a registry scanner if you have one. Then run the installer. If all goes well, remove the OLD folders when you are done. +++++++++++++++++++++++++++ If there is a problem, start your Computer in safe mode and try again. http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode This shows how to Start all Computers in Safe Mode; Free Online Encyclopedia

Let me see if I got you correctly before I judge your respond since I am not so tech savy. I have uninstalled firefox, then removed traces of it, from register and Program 86x, then reinstalled firefox. If that is what you are trying to say, it has not worked at all!

''FredMcD [[#answer-980585|said]]'' <blockquote> Let’s do a full clean re-install; [http://www.mozilla.org/en-US/firefox/all/ Download Firefox For All languages And Systems] {web link} Save the file. Then '''Close Firefox. ''' Using your file browser, open the '''Programs Folder''' on your computer. '''Windows: ''' C:\Program Files C:\Program Files (x86) '''Mac: ''' Open the "Applications" folder. https://support.mozilla.org/en-US/kb/how-download-and-install-firefox-mac '''Linux: ''' Check your user manual. If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it. See Install Firefox on Linux; https://support.mozilla.org/en-US/kb/install-firefox-linux If you downloaded and installed the binary package from the Firefox download page, simply remove the folder Firefox in your home directory. http://www.mozilla.org/firefox#desktop ++++++++++++++++++++++++++++ '''Do Not''' remove the profiles folder. Look for, and rename any '''Mozilla''' or '''Firefox''' program folders by adding .old to them. Do not rename the '''Mozilla Thunderbird''' folder if there is one. After rebooting the computer, run a registry scanner if you have one. Then run the installer. If all goes well, remove the OLD folders when you are done. +++++++++++++++++++++++++++ If there is a problem, start your '''Computer''' in safe mode and try again. http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode This shows how to Start all Computers in Safe Mode; Free Online Encyclopedia </blockquote> Let me see if I got you correctly before I judge your respond since I am not so tech savy. I have uninstalled firefox, then removed traces of it, from register and Program 86x, then reinstalled firefox. If that is what you are trying to say, it has not worked at all!

Question owner

I have run a system resort point before the problem occurred and reinstalled firefox (version 36 - the one I like) Now I am getting a new error message as follow The program can't start because "mozglue.dll" is missing from your computer. Try reinstalling the program to fix this problem.

I have run a system resort point before the problem occurred and reinstalled firefox (version 36 - the one I like) Now I am getting a new error message as follow The program can't start because "mozglue.dll" is missing from your computer. Try reinstalling the program to fix this problem.
FredMcD
  • Top 10 Contributor
4245 solutions 59390 answers

You need to do a full install because that file is missing.

https://support.mozilla.org/en-US/kb/install-older-version-of-firefox?cache=no Be sure to read everything here.

If you still want to downgrade, look under; I still want to downgrade. Click the Directory of other versions and languages link. Look for the directory of the version that you want. But, remember that old versions may have security issues.

You should also check out Firefox; Extended Support Release https://www.mozilla.org/en-US/firefox/organizations/

https://www.mozilla.org/en-US/firefox/organizations/notes/

https://www.mozilla.org/en-US/firefox/organizations/system-requirements/

You need to do a full install because that file is missing. https://support.mozilla.org/en-US/kb/install-older-version-of-firefox?cache=no Be sure to read everything here. If you still want to downgrade, look under; '''I still want to downgrade. ''' Click the '''Directory of other versions and languages''' link. Look for the directory of the version that you want. But, remember that '''old versions may have security issues. ''' You should also check out Firefox; Extended Support Release https://www.mozilla.org/en-US/firefox/organizations/ https://www.mozilla.org/en-US/firefox/organizations/notes/ https://www.mozilla.org/en-US/firefox/organizations/system-requirements/

Question owner

I have manually installed the missing dll file and now I have a new error message "couldn't load XPCOM"

I have manually installed the missing dll file and now I have a new error message "couldn't load XPCOM"
FredMcD
  • Top 10 Contributor
4245 solutions 59390 answers

FredMcD said

You need to do a full install because that file is missing.
''FredMcD [[#answer-981651|said]]'' <blockquote> You need to do a full install because that file is missing. </blockquote>

Question owner

I reinstalled it but it is not working out.

I reinstalled it but it is not working out.
FredMcD
  • Top 10 Contributor
4245 solutions 59390 answers
Did you do a full clean reinstall? see https://support.mozilla.org/en-US/questions/1164273#answer-980585

Question owner

FredMcD said

Did you do a full clean reinstall? see https://support.mozilla.org/en-US/questions/1164273#answer-980585

Yes I did, and got the error msg.

''FredMcD [[#answer-982123|said]]'' <blockquote> Did you do a full clean reinstall? see https://support.mozilla.org/en-US/questions/1164273#answer-980585 </blockquote> Yes I did, and got the error msg.

Question owner

a new error message "couldn't load XPCOM"

a new error message "couldn't load XPCOM"
FredMcD
  • Top 10 Contributor
4245 solutions 59390 answers

The full installer should have installed all of the needed files.

I called for more help.

The full installer should have installed all of the needed files. I called for more help.

Question owner

No It did not install all the needed files and as a result the error message is now "couldn't load XPCOM"

No It did not install all the needed files and as a result the error message is now "couldn't load XPCOM"
cor-el
  • Top 10 Contributor
  • Moderator
17467 solutions 157838 answers

Did you delete the Firefox program folder before reinstalling Firefox?

You can also try to install Firefox in Windows Safe Mode.

Did you delete the Firefox program folder before reinstalling Firefox? You can also try to install Firefox in Windows Safe Mode.

Question owner

Yes I did delete it before reinstall.

I tried but still same problem.

Yes I did delete it before reinstall. I tried but still same problem.
FredMcD
  • Top 10 Contributor
4245 solutions 59390 answers

And Windows Safe Mode?

And Windows Safe Mode?

Question owner

Nope it did not work out.

Nope it did not work out.
Tonnes
  • Locale Leader
246 solutions 1454 answers

Chosen Solution

Since you run version 36 and looking at this question, what happens when you install version 36.0.1 if not using it already?

Additionally I’d think of running a System File Check (sfc.exe) as suggested there.

Since you run version 36 and looking at [/questions/1048848 this question], what happens when you install [http://ftp.mozilla.org/pub/firefox/releases/36.0.1/win32/ version 36.0.1] if not using it already? Additionally I’d think of running a System File Check (sfc.exe) as suggested there.

Helpful Reply

I installed 36.0.1 and Firefox is working on my laptop now. Thanks!

I installed 36.0.1 and Firefox is working on my laptop now. Thanks!