Updated yesterday now firefox won't work

FireFox updated yesterday now I can't get it to open, Tried Ctrl+Shift+Esc Checked on Process Tab then FireFox.exe was not there. Also tried opening FireFox in safe mode and that wouldn't work either. Help

hello annarees, since this can sometimes be caused by malware active on a system, please run a scan with different security tools like the [http://www.malwarebytes.org/products/malwarebytes_free free version of malwarebytes], [http://www.bleepingcomputer.com/download/adwcleaner/ adwcleaner] & [http://www.microsoft.com/security/scanner/default.aspx microsoft safety scanner].
[[Troubleshoot Firefox issues caused by malware]]

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