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common causes of print spooler stop
http://www.brianmadden.com/forums/t/15322.aspx
http://support.microsoft.com/kb/934885
* To remove spooled print jobs that could be causing this problem, simply remove (or delete) files with extensions of “.spl” or “.shd” from the Spool location while the Print Spooler is stopped. This location is generally “c:\<windows directory>\system32\spool\printers”
spool not open
http://www.sysprobs.com/print-spooler-stopping-automatically-fix
http://www.tomshardware.com/forum/118934-45-printer-spool-running
http://www.tomshardware.com/forum/256169-45-print-spooler-start-error-1068-start-lexbce-server
http://www.tomshardware.com/forum/249890-45-windows-print-spooler-stops-adding-printer
http://www.tomshardware.com/forum/122437-45-system-find-print-spooler-service
http://www.technipages.com/fix-for-the-print-spooler-service-is-not-running-error.html