Hello, I have a problem with Mozilla Firefox: the browser doesn't open certain sites such as www.google.com, www.youtube.com and others, without some connection or similarities between them. There is no error, just remains a blank page when I write those sites on the address bar. If a page is already loaded and I write www.google.com on the address bar, nothing happens, remain the same page. In the search bar if is set www.google.ro, still doesn't work. I specify that those sites work well on other browsers. Operating systems is Windows 7 Ultimate. I've tried: * disable antivirus, * disable firewall, * Disable all add-ons, * delete cookies and Cache, * Create new profile, * manually delete profile, * full uninstal (remove all components), * Installing oldest vesiune (3.9 , 6.0), * installing new version (12.0 , 15.0a), * installing x64 version (Nightly 15.0a x64), * reset firefox, * new user in Windows, * virus scan, * malware scanning. The only thing didn't try is reinstalling Windows, and I want to avoid that. Please HELP! Thank you for your time and consideration