Common printer spooler problems include the spooler locking up, the spooler preventing jobs from being cleared, the spooler service crashing, and the spooler service preventing new queues from forming. An overloaded printer server causes the majority of issues involving printer spoolers.
Printer spooler crashes can result due to driver bugs or bad drivers, while high printing loads cause frozen printer spoolers. Restarting a printer can fix basic printer spooler issues like jobs not clearing or a locked spooler. If rebooting doesn't resolve the issue, call the printer manufacturer or the spooler drive company, as more complex problems require professional attention.