I'm trying to re-install Firefox 6.0 on my Windows 7 PC but can't because my computer won't create the right temporary files.

My computer crashed and I did a Windows 7 system restore. Everything seemed fine but afterward, Firefox would not launch -- I just got a popup box saying Firefox was already running and that I had to either shut down the program or restart my computer. I restarted my computer several times but it did not work.
I then uninstalled Firefox and tried re-installing it. I then received a popup box saying 7-zip, another program I had installed, couldn't create the temporary files needed. I uninstalled 7-zip, thinking that would solve the problem. Instead, I still get the same message, even without the program installed. I'd appreciate any advice ASAP -- I work from home and have hundreds of bookmarks and tabs that I use every day. Thanks so much!

Do a clean (re-)install:
* Download a fresh Firefox copy and save the file to the desktop.
* Firefox 4.0: http://www.mozilla.com/firefox/all.html
* Uninstall your current Firefox version and remove the Firefox program folder before installing that copy of the Firefox installer.
* Don't remove personal data if you uninstall the current version.
* 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 (not in the Firefox program 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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