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How do I correct an install and start problem

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I am running Windows 7. I installed Firefox without difficulty. All other running software including ZoneAlarm were turned off. When I tried to start Firefox I got the error message "Couldn't load XRE functions" and was unable to start the program. I uninstalled Firefox, rebooted my computer and reinstalled the software. Experienced the same problem. Any suggestions.

I am running Windows 7. I installed Firefox without difficulty. All other running software including ZoneAlarm were turned off. When I tried to start Firefox I got the error message "Couldn't load XRE functions" and was unable to start the program. I uninstalled Firefox, rebooted my computer and reinstalled the software. Experienced the same problem. Any suggestions.

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This is likely caused by Zone Alarm. Please try the instructions to turn off virtualization in the following support question http://support.mozilla.com/en-US/questions/880170

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This is likely caused by Zone Alarm. Please try the instructions to turn off virtualization in the following support question http://support.mozilla.com/en-US/questions/880170

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Suggestion to turn off ZoneAlarm Virtual Browser was the answer. Firefox is working well. Thanks for your help