Error: Unable to locate mime type octet /stream

I'm running 9.1 Pro on a Compaq Presario 2800T. This is what I get when I boot up my laptop. It started when I was creating a file association for msword files (one didn't seem to exist, but it did). Now after boot, I get a message for KDE Desktop with that error and the computer just seems to be trying to do something. Whatever it's going after it takes up almost all of the processor and runs the hard drive. The result is that I am unable to even move the mouse cursor. I did manage to delete the file association that I had created, but that didn't do the trick. Any ideas? Jack