Drain clears the screen at the first. After clicking "Enter" button, it shows some text while playing sound through the computer's speakers:
*** SYSTEM ERROR *** Water has been detected in drive C. Drive cleanup in progress. This will take a few moments. Drain phase beginning . . . Drain phase complete. Spin dry phase beginning . . . Spin dry phase complete. Drive cleanup complete. You may continue your work.
After that, the virus ends and the user can continue using the computer.