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Consistently does not open, gives the error: "C:\Program Files (x86)\Mozilla\firefox.exe Windows cannot access the specified device, path, or file. You may no

Installed FF 16, 17, 18. Will not open in normal administrator login, nor with "Run as administrator" but will in W7 safe mode. Changed permissions (had to do it in W7 Safe Mode, normal login would not allow (logged in as an administrator) could not delete the Mozilla files in normal login. On rare occasions, with a new install, I could get it to open once, then not again. Searched the reg for any mention of Mozilla or FF and cleaned it. Tried FF safe mode, no luck. Checked permissions after taking ownership and propagating full ownership rights to all FF files, many reboots, no luck. Chrome, IE and SeaMonkey work fine. Using a fairly new install of W7 Professional 64 bit, on a Dell Optiplex 990 i7, 16GB ram. Had the same problem with another user on an identical box. No problem on other computers No other program problems.

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