Since upgrading to FireFox 6 I cannot run Firefox in Avast Sandbox - get error "This application has failed to start because xul.dll was not found". Firefox works fine outside Avast Sandbox.

The error box is entitled
firefox.exe - Unable To Locate Component.
It suggests re-installing may fix the problem but I've un-installed and re-installed firefox a number of times and no change.

Download a fresh Firefox copy and save the file to the desktop.
* Firefox 6.0.x: http://www.mozilla.com/en-US/firefox/all.html
* Uninstall your current Firefox version.
* Do not remove personal data when you uninstall the current version.
Remove the Firefox program folder before installing that newly downloaded copy of the Firefox installer.
* It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.
Your bookmarks and other profile data are stored elsewhere in the Firefox Profile Folder and won't be affected by a reinstall, but make sure that you do not select to remove personal data if you uninstall Firefox.

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I was updating Firefox from version 6 to version 7, after updating I tried to open Firefox and the message I got is this: This application has failed to start because xul.dll was not found. How can I fix this?

I was updating Firefox to the newest version 7.0.1 from version 6.0.2 I think it was, I clicked the restart Firefox button that always comes up after updating. It started updating and then Firefox never restarted like it was supposed to after it was done updating. I then tried to open Firefox and it told me "This application has failed to start because xul.dll was not found." I did have Firefox crash on maybe about 30 minutes or so earlier which bothered me because I have been using Firefox for years and never had it crash on me before but I didn't think much of it at the time it happened because I was able to go back onto Firefox and finish what I had been working on. A while later I checked for updates and updated. The first time I tried to update it didn't work though so I had to shutdown Firefox and reopen Firefox and start the update a second time. It was after the second time that when I tried to open Firefox I got that message about failing to start because xul.dll can't be found. I filed a crash report when my Firefox crashed. This would have been around 1am-2am in the morning that Firefox first crashed and then wouldn't allow me to open it after updating. I have a DELL laptop running the Windows XP operating system but the laptop is probably at least 6 or 7 years old. The laptop will no longer charge so I always have to have it plugged into an outlet. Both my laptop hard drive and my external hard drive give me messages that I am running out of disk space on my hard drive. I bought this laptop 6 or 7 years ago second hand so it could be even older. In short it's a piece of crap and it gives me all kinds of issues but I currently can't afford a new one, but I have never had any problems with Firefox and I use Firefox more than any other aspect of my laptop so it's really really bothering me. May you please help me fix it?

Unfortunately I tried that and it didn't work. Thanks for the help though. I tried to uninstall and it said I couldn't because the file is corrupt or something, but I think I finally got it uninstalled and/or deleted or whatever, but now I try to reinstall/download it again from the beginning and I can't. No matter what I do I can not get Firefox working again. No matter how many times I try to redownload it. Any other suggestions?

Installing Latest Firefox on Windows XP Embedded gives error: "This application has failed to start because pdh.dll was not found"

I'm trying to install the latest (standards-based) browser I can on on old Windows XP Embedded computer. The computer's hardware does not meet the "Recommended Hardware" of a Pentium 4 (it has a P3). I initially tried installing/running Firefox version 28, and that seemed to work fine. Version 36 gives the error I stated in the question. It's not paramount that I run the *latest* version of Firefox (the browser is ONLY used for an intranet application), but I'd like to install the latest version that will run, and if there's a simple fix for this version, I'd like to explore that.
Regards,
Gerrat

Well, I was pretty sure it didn't have malware. It was running a steady state - like program & we have dozens of these on our network (but not on our domain). We have a corporate anti-virus (Sophos) running on all the computers on our domain, and there are no notifications of anything suspicious coming from these units.
Just to be sure I installed and ran an antivirus scan against it though - as suspected, nothing suspicious found.
As I mentioned, FF 28 runs fine, it's just the latest (36.0) that doesn't run (I haven't tested any versions in between). Either seems to install without hitch, but when the latest version is run, it gives the error about the missing dll.
Regards,
Gerrat

Everytime I turn on my computer running on Windows XP, a message appears from AppleSynchNotifier.exe-Unable to locate component - "this application has failed to start because CoreFoundation .dll was not found," Reinstalling did not fix problem.

Everytime I turn on my computer running on Windows XP, a message appears from AppleSynchNotifier.exe - Unable to Locate Component -
"This application has failed to start because CoreFoundation.dll was not found. Re-installing the application may fix this problem.
I uninstalled and re-installed itunes and the message still appears.
How do I fix this??
Thank you

With that one, first try uninstalling and reinstalling your MobileMe Control Panel for Windows, robin. Does that make the error go away?

Itunes update would not install due to an error, now itunes won't run and I get this message when I try to launch itunes: "This application has failed to start because MSVCR80.dll was not found. Re-installing the application may fix this problem"

itunes update would not install due to an error, now itunes won't run and I get this error message when I try to launch itunes: iTunes.exe - Unable to Locate Component "This application has failed to start because MSVCR80.dll was not found. Re-installing the application may fix this problem."
I'm on a Dell PC running Vista Home Premium.
HELP!!!!!!!!!!!!!!!!!!!

try removing all itunes and all other apple program
follow this link for more info. http://support.apple.com/kb/HT1923
reboot ur window after uninstalling
after that download the latest itunes setup and install.

HT1349 When trying to run itunes on my PC, get this message. This application has failed to start because MSVCR80.dll was not found.

When trying to run itunes on my PC, I get this message. This application has failed to start because MSVCR80.dll was not found. Do you have any clues on a solution?

Welcome to Apple Support Communities
A solution is listed in the thread below.
It probably and other similar discussions appear in the More Like This window to the right of your question. The ones with a green check mark are questioned marked 'answered' by the original poster.
https://discussions.apple.com/message/24610401#24610401

I had some issues with viruses,and went through to delete them. Since then I can't access firefox, and I am getting a message stating, "This application has failed to start because netlkr.dll was not found. Re-installing the application may fix this probl

Yesterday afternoon I was suddenly bombarded with literally masses of viruses, and since then my firefox has become completely unresponsive. There is an error message stating that "netlkr.dll was not found," and I have no idea whatsoever what exactly that means. I would very much appreciate some help here. I have also already tried numerous times trying to uninstall and re-install firefox, but to no aveil. Nothing I have tried for a solid day now has done any good. Please help!
== This happened ==
Every time Firefox opened
== Yesterday afternoon ==
== User Agent ==
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; GTB6.3; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; InfoPath.2)

Hey I finally got an older vesion of itunes to work!!! 10.7 x64 for windows 7
After uninstalling all apple products even quicktime
I had to delete everything from (program files, and program files x64, program data,)
And all downloads from apple, and I went in to search deleted other stuff from apple, and itunes
But definently not my itunes library and Playlist
Down loaded 10.7 x64 for windows 7, but checked (do not start when done)
Then I emptied my recycling bin and restarted my PC
I ran geek tech tool box same as reg cure pro, also PC Tools registry cleaner, and CC Cleaner
Then I emptied my recycling bin and restarted my PC
And wallah... It finally works, and I Love the older version anyways.
Easier to download and transfer music!!!!!

I get the following message whentrying to open Firefox - "This application has failed to start because sqlite3.dll was not found. Re-installing the application may fix this problem It hasn't. The file is easily located in the Firefox folder.

I have re- installed Firefox on 3 occasions recently; mainly in the hope of resolving problem with constant crashes. Yesterday, 22 August, I installed Firefox again to be met with the sqlite.dll3 problem. Ihave uninstaaled and re-installed (from the website) and am still getting the same message.

This procedure might work or might not work:
Download the free Ccleaner and repair your Registry (repeat until clear)
http://www.piriform.com/ccleaner/download/standard
Uninstall iTunes according to Apple's directions here
http://support.apple.com/kb/HT1925
Use Ccleaner and repair your Registry again just in case.
Then download/install iTunes again from the Apple website
http://www.apple.com/itunes/
Your iTunes content will not be removed,
Please regularly backup your iTunes content to external medium (hard drive, cd/dvd's) using the File>Backup Library in iTunes. Apple will not reissue new copies of content.
(Notice: this post is a copy/paste in a hope that a uninstall/reinstall and repair of your Registry may solve your particular issue, Windows issues are particular difficult to resolve due to multiple factors, so my advice is to be taken into advisement with others recommendations which may be more specific or experienced in resolving your issue. If it or others recommendations solve your issue, please respond back with a "Correct" or "Helpful" or not resolved responses so we can further refine our efforts in trying to successfully assist others. I receive no compensation for product mention.)

TS3212 I cannot get the new iTunes to start in Windows Vista. I get an error that states "This application has failed to start because MSVCR80.dll was not found". Reinstalling does not help.

I get an error that states "This application has failed to start because MSVCR80.dll was not found". Reinstalling does not help.I have tried removing iTunes and reinstalling, I have tried "repairing" option at reinstall, nothing seems to work.

Read this:
iTunes 11.1.4 for Windows - Unable to install or open - MSVCR80 issue

I recently tried to update iTunes to 11.1, and am now getting an error message "This application has failed to start because MSVCR80.d11 was not found." I have uninstalled and reinstalled iTunes multiple times. Am running Windows XP Svc Pack 3. help

I recently tried to update iTunes to 11.1, and am now getting an error message "This application has failed to start because MSVCR80.dll was not found. Reinstalling the application may fix this problem." I have uninstalled and reinstalled iTunes several times with no success. I am running Windows XP Svc Pack 3. Help please.

Click here and follow the instructions. You may need to completely remove and reinstall iTunes and all related components, or run the process multiple times; this won't normally affect its library, but that should be backed up anyway.
(99753)

HT1926 I tried to download the latest version of iTunes but now seem to have lost everything and can not access my library at all. Instead i keep on receiving the message 'Application has failed to start because MSVCR80.dll was not found. I cannot access

I tried to download the latest version of iTunes but failed half way through. It suggested that i reinstall we I tried. However, i now get this message which states "Application has failed to start because MSVCR80.dll was not found. Reinstalling the application may fix the problem"
I have tried this but with no success. I have therefore found that I cannot access my iTunes library at all now.
What should I do.

Click here and follow the instructions. You may need to completely remove and reinstall iTunes and all related components, or run the process multiple times; this won't normally affect its library, but that should be backed up anyway.
(99792)

When I try to open Firefox I receive this message, "Application has failed to start because ssl3.dll was not found." HELP!

I've been using Firefox for about 3 years. Today, I ran a scan of my computer Webroot Anti Virus and deleted all "risky stuff" they checked. Don't know if this is a coincidence but right after the scan I could not open Firefox. I receive the message, "Application has failed to start because ssl3.dll was not found. Reloading application may remedy this." I reloaded Firefox, the current version, clicked on open and received the same message. I've reloaded Firefox 3 more times with the same results. Now I need HELP.

See if you can make Webroot restore that file in the Firefox program folder (C:\Program Files\Mozilla Firefox\).<br />
If not then you need to reinstall Firefox and make sure that Webroot doesn't do that another time.
You can find the latest Firefox release here:
*Firefox 8.0.x: http://www.mozilla.com/en-US/firefox/all.html

Please help! I am trying to upgrade an old itunes to 10.7 version. I am getting a message "This app has failed to start because ASL.dll was not found. What do I need to do to get the new version to operate on my vista 32 bit operating system?

I am have problems upgrading my old itunes system to the 10.7 version. I have downloaded w10.7 to my desk top. However, when I try to install it, it seems to be installing for a while, then I get a message box that says: "The system administrator has set plicies to provent this installation".... Can you help me get it installed...
Thanks,

B Noir --
I can't tell you how much I appreciate your taking the time to help me with this problem. I'm doing a healing technician training class at my church, and have most of my study material on my ipod. It cashed this weekend which hindered my preparation for my class tomorrow night. I went to the local "Apple Store" late last night and they could get me up and running. They suggested that I call the APL CARD line which I did today, but they gave me a nice run around seccession, and did nothing. Then I was lead to "Google" my question, which eventually lead me to the "Apple" site. Praise the LORD for your help and may you be richly blessed with multiplied blessings in all that you put your hands to do. May you receive a great harvest. As far as I'm concerned you were used by the LORD, and are the real genius!!!
Thanks
JimTalbot7

Since the lastest update i am unable to open up my itunes. i receive a message saying applicatin has hailed to start because MSVCR80.dll was not found. re-installing the applicaiton may fix this problem

Since the lastest update i am unable to open up my itunes. i receive a message saying applicatin has hailed to start because MSVCR80.dll was not found. re-installing the applicaiton may fix this problem

Try the following user tip:
Troubleshooting issues with iTunes for Windows updates

While running an update in Itunes i received an error message - Unable to locate component because AVFoundationCF.dll was not found. Then Itunes was not installed correctly. Error 7 (windows error 126) Do I have to reinstall and will I loose all my music?

While running an update in itunes (not installing), it stopped in the middle of the update and i receceived the following messages:
Application failed to start because AVFoundationCF.dll was not found. Reinstalling itunes may fix the problem. Then "itunes was installed incorrectly. Please reinstall itunes Error 7 (Windows error 126)". If i uninstall and reinstall itunes will I lose all of my music, etc.?

Go to Control Panel > Add or Remove Programs (Win XP) or Programs and Features (later)
Remove all of these items in the following order:
iTunes
Apple Software Update
Apple Mobile Device Support (if this won't uninstall press on)
Bonjour
Apple Application Support
Reboot, download iTunes, then reinstall, either using an account with administrative rights, or right-clicking the downloaded installer and selecting Run as Administrator.
The uninstall and reinstall process will preserve your iTunes library and settings, but ideally you would back up the library and your other important personal documents and data on a regular basis. See this user tip for a suggested technique.
Please note:
Some users may need to follow all the steps in whichever of the following support documents applies to their system. These include some additional manual file and folder deletions not mentioned above.
HT1925: Removing and Reinstalling iTunes for Windows XP
HT1923: Removing and reinstalling iTunes for Windows Vista, Windows 7, or Windows 8
tt2

Since upgrading to FireFox 6 I cannot run Firefox in Avast Sandbox - get error "This application has failed to start because xul.dll was not found". Firefox works fine outside Avast Sandbox.

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