a few months ago i started having trouble with the sound on my computer, itunes and internet sounds specifically. since then i've been able to fix my itunes sound but still can't get internet sound (youtube, myspace music, etc.) to work. i've tried uninstalling flash player but couldn't find it and when i try to update my firefox it just searches forever and doesn't install anything. anyone have ideas about what i should try to fix the sound for my internet?