Firefox opens but completely unresponsive even after reinstall

I'd been having problems with Firefox hanging. It didn't appear to have anything to do with any of my addones, as I continued having problems even after disabling them--first one at a time, then all of them. Now after updating to the new version, (thinking that might be the problem) it will open but then immediately hangs (I am unable to even try any of the "fixes"): Error mesasge in toolbar "Firefox is not respponding". I tried completlyuninstalling and reinstalling and that didn't work either. Now the first time I uninstalled and reinstalled I was given the option of deleting my presonal preferences as well, essentially reinstalling a factory fresh Firefox browser. I said no,. Well when the reinsiall didn't work, I tried uninstalling again but this time the option didn't even come up. I have also tried a systm restore without effect. In addition I have run a complete virus scan with AVG and I'm coming up clean. There are several odd things about this glitch: At some point an addon that synchonized my FF favorites with my other browsers erased the back ups on the other browsers (it isn't supposed to do that if shut off as far as I know or I would have chosen a different method). I can't locate my FF favorites in order to save the file (I really want to keep them). The favorites bar is still on the toolbar, so they do seem to be intact on FF, of course I can't access anything. I am completely flummoxed given that even uninstalling and reinstalling hasn't worked. I am not getting any other error messages other than that the browser is not responding. I am currently using Windows 7 on a gateway netbook. The only thing that might possibly have anything to do with this is that at some point some program changed my home page and search engine to Delta. I suspect it was Vuze, but I had selected no and aborted the installation. I still had to manually change them back to my personal defaults. Obviously that shouldn't have affected my browser in this way. The only two other programs I've installed within this time period were from Giveaway of the day and Games giveaway of the Day both reputable websites. None of the feedback from these two programs indicated anything about hijacked home/search engines from other users--who would most definitely be kicking up a fuss. So I have two basic issues: Fixing FF and saving my favorites from FF. Tried again, making sure that the AVG was off, and while it didn't hang the first second, it started hanging as soon as I opened a web page or the add on page. Also note that I cannot install the troubleshooter. I saved the program but it won't install or even apparently recognize that I have FF installed.

Create a new profile as a test to check if your current profile is causing the problems.
See "Creating a profile":
*https://support.mozilla.org/kb/profile-manager-create-and-remove-firefox-profiles
*http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Profile_issues
If the new profile works then you can transfer some files from an existing profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over the problem.
*http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

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