Systematically, does not open, gives the error: "C:\Program Files (x86)\Mozilla\firefox.exe Windows cannot access the specified device, path or file.» You can not

Installed FF 16, 17, 18. Does not open in the normal administrator account, or with "Run as Administrator" but will be in SafeMode to W7. Changed the permissions (normal connection had to do in Mode without failure of W7, would not allow (connected as an administrator) can not delete the files from Mozilla in normal connection.) On rare occasions, with a fresh install, I could get it to open once, then not again. Searched the reg any mention of Mozilla or FF and cleaned. Tried FF safe mode, no luck. Check permissions after appropriators and multiplication of the rights of full ownership of all the files of FF, several reboots, no luck. Chrome, IE and SeaMonkey work very well. Using a fairly new installation of W7 Professional 64 bit on a Dell Optiplex 990 i7, 16 GB of ram. Had the same problem with another user on the same box. No problem on other computers without other problems in program.

Finally have it running. Seems that the enterprise version of McAfee is blocking the installation of the program. McAfee uninstalled, reinstalled Firefox, installed McAfee and now, it's good to go.

Tags: Firefox

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