For future reference for problems like this, consider completely
powering off the printer (not the computer) and leaving it off for a
couple of minutes.
When you print in Windows, the app that creates the print file (e.g.,
Word) passes it to the OS (e.g., WinXP). Typically, the OS puts the
print file in a spooler, which is just another name for a queue in
temporary storage. The OS then sends the file from the print queue to
the printer; if the file is larger than the printer can accept at once,
the OS sends bite size chunks of the file to the printer until the whole
file is sent (that's a main reason for using a spooler; if the file was
sent directly from the app to the printer, you'd have to wait until the
entire file was sent until you could resume working in the app).
While the file is in the spooler's print queue, you can access it and
delete it by double clicking on the printer icon in the "systray" or
"notificaton area." However, once the file has been sent to the
printer, the OS no longer has any control over it. And since the file
has now left the computer, turning the computer off will have no
effect. If you have a printer with a fairly substantial amount of
memory, it can hold a lot of pages worth of printing. If you power-off
the printer, you clear that memory and thus flush the print job.
