How can I fix an installation and startup problem

I am running Windows 7. I installed Firefox without difficulty. All other software running, including ZoneAlarm were off. When I tried to start Firefox, I got the error message "Unable to load XRE functions" and was not able to start the program. I uninstalled Firefox, restarted my computer and reinstalled the software. Had the same problem. All of the suggestions.

This is probably caused by Zone Alarm. Please try out the instructions to disable virtualization in the next issue of support http://support.mozilla.com/en-US/questions/880170

Tags: Firefox

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