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cannot close firefox process, even after uninstalling and reinstalling firefox,and ending precess in task manager

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Firefox will not open, says "already running". At task manager I cancelled process, and still no result. I then uninstalled all firefox files, and reinstalled. I still get same error message. I cannot open any firefox page. I have skype. I followed troubleshooting info, an d still I cannot open firefox.

This happened

Every time Firefox opened

== I restarted my computer

Firefox will not open, says "already running". At task manager I cancelled process, and still no result. I then uninstalled all firefox files, and reinstalled. I still get same error message. I cannot open any firefox page. I have skype. I followed troubleshooting info, an d still I cannot open firefox. == This happened == Every time Firefox opened == I restarted my computer

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I removed the program and reinstalled by with no success, i get allways the same massage: "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 don't know what to do can someone give directions Thank you