I have a bunch of computers that when printing to HP printers (I've mostly noticed it on the HP 4100TN or 4050tn) that when they print and if the paper is out or someone put in letter instead of legal. There print stops and the jobs are stuck. Right now they either reboot or I restart the print spooler which usually works. I have the pc's updated to the lates patches, they are using the latest HP drivers. I've tried changing the spooling options on the software driver on the PC. No luck.