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when I try to open Firefox, a pop up says it is already running and I must close a window or restart. I can not figure out how to close the window they are asking me to.

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AnonymousUser
AnonymousUser
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when I try to start Firefox, a pop up says it is already running and I must close a window or restart. I can not figure out what window they want me to close

This happened

Every time Firefox opened

User Agent

Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; WOW64; Trident/4.0; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; MDDC; .NET CLR 3.5.30729; .NET CLR 3.0.30618)

when I try to start Firefox, a pop up says it is already running and I must close a window or restart. I can not figure out what window they want me to close == This happened == Every time Firefox opened == User Agent == Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; WOW64; Trident/4.0; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; MDDC; .NET CLR 3.5.30729; .NET CLR 3.0.30618)

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cor-el
cor-el
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See http://kb.mozillazine.org/Firefox_hangs and Firefox hangs or is not responding - How to fix (Hang at exit)

Check in the Task Manager (XP: Ctrl+Alt+Del, Vista: Shift+Ctrl+ESC, Processes tab) if there are hanging Firefox processes. If you see any firefox.exe processes then click the End button to end those Firefox processes. You can only start Firefox in Safe mode or launch the Profile Manager is all Firefox processes are ended. See also http://kb.mozillazine.org/Kill_application