Using Firefox. Was using Media Player for any web videos, etc. Installed Quicktime as default player, hated it as I couldn't resize the screen. Uninstalled Quicktime. Changed all the filetypes to play from Media Player again - both in Firefox and Control Panel. Can no longer play media directly from the internet in Firefox. I get an very unfriendly error regarding Quicktime and the browse window freezes. Using IE to play directly from the internet works fine. Playing directly from my hard drive has no problem. Both play using Media Player. Any thoughts?