Firefox v.36 worked fine. I then added a password to User Account on WinXP Pro, and the system began setting protection on all files. After this no URLs will load, saying "Server Not Found" The same URLs load in a Chrome browser. I've followed the steps to remedy in Mozilla forum, to no avail. I am at my wits end. Seems like a simple issue, but doesn't seem to "try" any HTTP calls. Please help!