Print Scheduler Priority - Hardware Enhancement Windows XP Registry Hack

Here’s how to control the priority of the Print Scheduler. Navigate to

HLM\System\CurrentControlSet\Control\Print

Create a new DWORD value called SchedulerThreadPriority and set it to one of the following. Note that the value might already exist.
0 is for Normal
1 is for Above Normal
ffffffff (eight “F”s) is for Less Than Normal
Log off and log back in, or restart, for the change to take effect.