I don't know what the cause of this is, but occasionally my computer will do what I described above. I *think* it happens only when a program is using a lot of my resources: for instance, it happens all the time in new games, but rarely in old games or something like Internet Explorer (although this still happens). Turning off the speakers then turning them back on does nothing for the buzzing, and the only thing to stop the buzzing and unfreeze my computer is a hard reset. Here is a link to a topic about this same problem:
http://www.techimo.com/forum/tid7096...pn1/index.html
I have tried everything that everyone in that topic suggests, except for all of the BIOS stuff. I can't access my BIOS, it's not a computer problem and I don't feel like explaining it. Any help at all would be...well, helpful. Thanks in advance.