Yesterday and today, could not access any site with Firefox, as this message appears: "http//...is not a valid Win32 application" This happens when trying to go to any website. Firefox would not open - I had to use Internet Explorer, which did not have this problem. I tried "Restore" this morning - still not able to use Firefox, which I've used for years and never had this issue. Yesterday I also scanned my computer with AVG which found no problems.