This is what I got looking at the help file in windows:
"Using Dr. Watson to diagnose program errors
Dr. Watson for Windows NT is a program error debugger that detects and diagnoses program errors, and then logs the resulting diagnostic information.
In the event of a program error, Dr. Watson for Windows NT starts automatically. Technical support personnel then can use the information logged by Dr. Watson to diagnose problems.
To start Dr. Watson
Click here .
For information about how to use Dr. Watson, click the Help menu in Dr. Watson."
There's more info in the help file of Dr. Watson that should answer whether or not you can kill it w/out effecting anything else. Hope this helps...
Dr.