Keeping computer users feeling safe and secure has become big business.
Users can program the PC to call the police, page the owner or set off an alarm.
The computer sits silent, turned off for the night. Suddenly, it starts up. In a few minutes, Michael Garoufalidis' pager beeps. Then the office phone rings, followed by loud, sirenlike sound bursts from the speakers. He believes in his product, believes it can be successful if only he can get the word out.