JSI Tip 0548 - Corrupted EMF file uses 100 of a CPU and the Spooler is in a never ending loop.

A corrupted enhanced meta file (EMF) record embedded within the print stream can cause the Spooler to enter an infinite loop. This uses all the CPU time for a single processor machine and prevents the print job from completing.

Boot to an alternate install of NT and delete the *.shd and *.spl file from the Spool folder.

If you have a multi-processor, you can pause the printer and delete the files.