Since installing XP SP2, my HP PSC500 printer has stopped working correctly.
After using the printer a few times, and switching user a few times all
attempts to print result in an error dialog indicating the document failed
to print.

The first two times this happened, I rebooted the system and it cleared the
problem.

The last time it happened, I checked the printer properties, and noticed
that the port for the printer was something called "DOT 4_001". I have no
idea what this is, and guessing that maybe it is some virtual port that did
not get updated with the SP2 upgrade, I changed the port to LPT1.

The printer is now working correctly.

Is there a known issue, with this DOT 4_001 printer port?

What is this?

Is there a reason that I should even care? LPT1 seems to be working.

Michael Giroux