Firefox states it is already running yet won't open even after I uninstalled and reinstalled

Hi,
I was having problems with Mozilla when I'd go to Facebook it would show the page but within seconds I would get check6 (can't remember the rest) error page.
So I went to help, restart Firefox. It was at this for about an hour and I knew there was a problem so chose to end process in task manager.
Since then I haven't been able to open Firefox:
"Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system".
I uninstalled Firefox using Revo Uninstaller and deleted all leftover files, restarted my computer and installed Firefox, but the problem still remains.
I tried looking through previous questions and noticed I do no have a profile folder which may be needed to delete a lock file....
Any help much appreciated! thanks

I had this problem yesterday, actually. You can solve it, but you will lose all firefox data you didn't back up. Then again, because you already tried uninstalling and reinstalling, I assume this isn't an issue.
Assuming you've installed windows on the C drive:
Go to C://Users/yourname/AppData
If you cant find it, go to your display settings (I hope I translated this correct; I use the Dutch version of Windows) and make sure that hidden files and filders are not being... well, hidden. Shocking plottwist, I know.
If all goes well, you should now see three folders named Local, Localrow and Roaming.
Now go to Roaming > Mozilla > Firefox and delete everything thats in there. Now you have an empty FireFox folder, which will force Firefox to start up as if it was never installed before.
Done! :)
P.S. Now that you have a fresh new install, save yourself a lot of future pain and install [https://addons.mozilla.org/firefox/addon/xmarks-sync Xmarks] for your bookmarks and [https://addons.mozilla.org/firefox/addon/lastpass-password-manager LastPass] for your passwords. These add-ons will keep your data safely on their servers, where it is yours to backup and download anywhere in the world.
Also, if you have about three milion add-ons and personas/themes and you don't want to hunt hem down again everytime you reïnstall Windows or buy a new system, get [https://addons.mozilla.org/firefox/addon/febe FEBE] to save a copy of them for you. And if you really want to backup like a pro, install [https://www.dropbox.com/ DropBox] (not an addon) and tell FEBE to store its files there, so you can still retrieve them if your house happens to burn down.
Xmarks, LastPass and FEBE: the holy trinity of Firefox backups :P

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Previously running CS4 won't open, even after script clean and reinstall

I can't get in!....
Seems like a license issue.
After trying all (7) of the fixes in kb405970 recommended by Adobe tech support, I was unable to get access to my previously working CS4 Production Suite products. I removed the entire program and ran CS4 Clean Script for Macintosh, then reinstalled Production Suite.
Now, when I try to get into any of the products, i get a registration screen that accepts my VALID and REGISTERED (from the Adobe Registration site) CS4 Prod Suite serial number, and NOTHING happens. No programs open.I can't get any response from Adobe tech support for the last 10 days. Case has been open since October 18. I'm just diving into asking for help in a forum.
HELP! Please

I had this problem yesterday, actually. You can solve it, but you will lose all firefox data you didn't back up. Then again, because you already tried uninstalling and reinstalling, I assume this isn't an issue.
Assuming you've installed windows on the C drive:
Go to C://Users/yourname/AppData
If you cant find it, go to your display settings (I hope I translated this correct; I use the Dutch version of Windows) and make sure that hidden files and filders are not being... well, hidden. Shocking plottwist, I know.
If all goes well, you should now see three folders named Local, Localrow and Roaming.
Now go to Roaming > Mozilla > Firefox and delete everything thats in there. Now you have an empty FireFox folder, which will force Firefox to start up as if it was never installed before.
Done! :)
P.S. Now that you have a fresh new install, save yourself a lot of future pain and install [https://addons.mozilla.org/firefox/addon/xmarks-sync Xmarks] for your bookmarks and [https://addons.mozilla.org/firefox/addon/lastpass-password-manager LastPass] for your passwords. These add-ons will keep your data safely on their servers, where it is yours to backup and download anywhere in the world.
Also, if you have about three milion add-ons and personas/themes and you don't want to hunt hem down again everytime you reïnstall Windows or buy a new system, get [https://addons.mozilla.org/firefox/addon/febe FEBE] to save a copy of them for you. And if you really want to backup like a pro, install [https://www.dropbox.com/ DropBox] (not an addon) and tell FEBE to store its files there, so you can still retrieve them if your house happens to burn down.
Xmarks, LastPass and FEBE: the holy trinity of Firefox backups :P

Firefox won't do the Master Password thing on mynew laptop. I have to eneter P/W's on each site i vist. it has worked fine on my PC, but even after i uninstall and reinstall Firefox, it still doesn't work.

i used to run the Norton password feature (it came w/ the new laptop) but now that i switched to McAfee, it doesn't recognize when i go to different sites. I've set up everything in the Mozilla menu (Tools, Options, Security, etc). it doesn't ask me of it want it to remember the password when log into Yahoo/Google/Facebook/etc)
i really like this feature and would like to figre out how to make it work. it works fine on my PC, by the way, just not on my laptop

I have had a similar problem with my system. I just recently (within a week of this post) built a brand new desktop. I installed Windows 7 64-bit Home and had a clean install, no problems. Using IE downloaded an anti-virus program, and then, because it was the latest version, downloaded and installed Firefox 4.0. As I began to search the internet for other programs to install after about maybe 10-15 minutes my computer crashes. Blank screen (yet monitor was still receiving a signal from computer) and completely frozen (couldn't even change the caps and num lock on keyboard). I thought I perhaps forgot to reboot after an update so I did a manual reboot and it started up fine.
When ever I got on the internet (still using firefox) it would crash after anywhere between 5-15 minutes. Since I've had good experience with FF in the past I thought it must be either the drivers or a hardware problem. So in-between crashes I updated all the drivers. Still had the same problem. Took the computer to a friend who knows more about computers than I do, made sure all the drivers were updated, same problem. We thought that it might be a hardware problem (bad video card, chipset, overheating issues, etc.), but after my friend played around with my computer for a day he found that when he didn't start FF at all it worked fine, even after watching a movie, or going through a playlist on Youtube.
At the time of this posting I'm going to try to uninstall FF 4.0 and download and install FF 3.6.16 which is currently on my laptop and works like a dream. Hopefully that will do the trick, because I love using FF and would hate to have to switch to another browser. Hopefully Mozilla will work out the kinks with FF 4 so I can continue to use it.
I apologize for the lengthy post. Any feedback would be appreciated, but is not necessary. I will try and post back after I try FF 3.16.6.

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== User Agent ==
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~~~~~~~~~~~
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Hello
This morning iTunes started refusing to open. When opened it bounces twice and then closes.
Strange, because I didn;t just update. It worked fine after my last update and up until the present. I'm not sure but it could have started happening after I plugged in my iPod Touch 16gb 2.0. I did that sometime this morning.
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I live in noisy Barcelona and i'm going crazy without tunes...

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'User'/AppData/Local/Apple Computer/
'User'/Music/iTunes/(all files except music and app folders)
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ITunes won't open even after reinstall

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I am admin
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I have reinstalled and clicked "repair"
I have uninstalled and reinstalled twice
I have clicked on the link for itunes in my start\all programs location
I have searched this support community and can not find a converstaion that has to do with no specific error box.
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Empty/corrupt library after upgrade/crash
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AdapterDeviceID: 0x 863
AdapterDriverVersion:
AdapterVendorID: 0x10de
Add-ons: %7B972ce4c6-7e08-4474-a285-3208198ce6fd%7D:33.1.1
BuildID: 20141113143407
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EMCheckCompatibility: true
EventLoopNestingLevel: 1
FramePoisonBase: 7ffffffff0dea000
FramePoisonSize: 4096
InstallTime: 1416177811
Notes: AdapterVendorID: 0x10de, AdapterDeviceID: 0x 863GL Layers? GL Context? GL Context+ GL Layers+
ProductID: {ec8030f7-c20a-464f-9b0e-13a3a9e97384}
ProductName: Firefox
ReleaseChannel: release
SecondsSinceLastCrash: 167372
StartupTime: 1416510925
Theme: classic/1.0
Throttleable: 1
URL: about:home
Vendor: Mozilla
Version: 33.1.1
useragent_locale: en-US
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That is a problem with the "Facebook Photo Uploader" (fbplugin).
*[https://bugzilla.mozilla.org/show_bug.cgi?id=1086977 bug 1086977] [10.10] Facebook's old "Facebook Photo Uploader" (fbplugin) crashes on load on OS X Yosemite
You can check these location if you can find this plugin file:
* /Library/Internet Plug-Ins
* ~/Library/Internet Plug-Ins
*https://developer.mozilla.org/Gecko_Plugin_API_Reference/Plug-in_Basics#How_Gecko_Finds_Plug-ins
In Mac OS X v10.7 and later, the ~/Library folder is a hidden folder.
*http://kb.mozillazine.org/Show_hidden_files_and_folders#Mac_OS_X

Firefox states it is already running yet won't open even after I uninstalled and reinstalled

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