Many months ago I was using Mozilla Firefox and it was not working correctly. I decided to uninstall it and reinstall the newest version. After installation, it would not work. I decided to install Netscape and it did not work. My computer will also not run many Mirosoft programs, i.e. Internet Explorer, Media Player, Messenger. Another strange thing is that I can open a folder, type in an internet address and connect to the internet. But it won't let me log into any site or open a new window. Has anyone ever heard of any of these problems before? I have a 5-6 year old Toshiba Satellite Pro 4600 running Windows XP.