Hi,
Check chan vu's message here - the very top one.
fixed spooler subsystem app stopped working
http://social.technet.microsoft.com/Forums/en/itprovistaprinting/thread/460f297a-dd66-4476-a176-542e1519ca3e
If the above did not help :
Use this method to clear the spooler then uninstall and reinstall your printer (check with the maker for
the latest driver).
Check the Mr Fixits here and if you have to use the other methods go back and try them again afterwards.
Printing problems and printing errors - a Mr Fixit
http://support.microsoft.com/gp/printing_problems
Troubleshoot printer problems - a Mr Fixit
http://windowshelp.microsoft.com/Windows/en-US/help/8c11977e-8244-408f-a036-7978a618d7a21033.mspx
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Logon as Admin
Start - type in Search box -> COMMAND - find at top of list and RIGHT CLICK - RUN AS ADMIN
you can copy and paste each line in except the ones in brackets and hit enter after each.
net stop Spooler
(will echo Deleting all print jobs) <-- you should see this returned
ping localhost -n 4 > nul
del /q %SystemRoot%system32spoolprinters*.*
net start Spooler
(will echo Done!) <-- you should see this returned
ping localhost -n 4 > nul
Another way
http://4sysops.com/archives/how-to-cancel-a-print-job-that-hangs-under-windows-vista-and-xp/
Check the print cue - DELETE/STOP all jobs - then Right Click on printer - DELETE Printer
http://windowshelp.microsoft.com/Windows/en-US/Help/bb6f81d9-4092-4ac8-9716-2bd008f513e11033.mspx
If using Control Panel - Classic - Printers
Try after unplugging your printer if needed.
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Also check the Print Spooler Service and its dependencies and their dependencies.
Print Spooler Service
http://www.blackviper.com/WinVista/Services/Print_Spooler.htm
How to Fix Windows Vista Print Spooler not Starting
http://www.ehow.com/how_4920100_vista-print-spooler-not-starting.html
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Check this thread if needed - stop and clear the spooler
http://social.answers.microsoft.com/Forums/en-US/vistaperformance/thread/a15779d6-ac0d-42fd-9ac2-a1da241ea19f/
and here
http://social.answers.microsoft.com/Forums/en-US/vistahardware/thread/58b54fa9-cf6f-40f7-90b2-8093c6777493
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Clean up general corruption and repair/replace any damaged/missing files.
Run DiskCleanup - Start - All Programs - Accessories - System Tools - Disk Cleanup
Start - type this in Search Box -> COMMAND find at top and RIGHT CLICK - RUN AS ADMIN
Enter this at the prompt - sfc /scannow
How to analyze the log file entries that the Microsoft Windows Resource Checker (SFC.exe) program
generates in Windows Vista cbs.log
http://support.microsoft.com/kb/928228
Run CheckDisk (chkdsk) at startup.
How to Run Check Disk at Startup in Vista
http://www.vistax64.com/tutorials/67612-check-disk-chkdsk.html
Hope this helps.