The first thing I would do is run "top" from the command line. Most likely you will see "beagled" and its helper right up there at the top. If this is true, quit top and run beagle-shutdown from the command line (as root) and then uninstall it. Do not try and shut down beagle with "kill pid#" as it will restart anyway and you will have to reboot before you can do anything worthwhile. This made made a huge increase in performance on my machine. This has also been discussed in prior
posts. If it's not beagle, then running top should let you know what's going on.
Good Luck