"Ron G" wrote in message
...
I have a problem with my computer, and I really need some expert help-----

Periodically, maybe every 30 minutes sometimes, or sometimes only 3
minutes
apart, the computer speakers produce a rogue--

dit-dita-dit-dit, dit-dit-dit-dit

I suspect it's not your computer at all, but your speakers. Computer
speakers are notoriously bad for picking up stray RF and turning it into
audio. It happens with my little 2meter HT all the time. I suspect that you
have a ham operator nearby who is either operating CW or possibly a repeater
or other transmitter that has a CW ID (if it's actually coming out as tones,
this is the more likely case). It could be someone transmitting tones in CW
maliciously, but I would look into these other possibilities first.