HP LaserJet M4345 Multifunction Printer series - Manual (Page 239)

Solve common Windows problems
Error message:
"General Protection FaultException OE"
"Spool32"
"Illegal Operation"
Cause Solution
Close all software programs, restart Windows, and try again.
Select a different printer driver. If the device PCL 6 printer
driver is selected, switch to the PCL 5 or HP postscript level
3 emulation printer driver, which can be done from a
software program.
Delete all temp files from the Temp subdirectory. Determine
the name of the directory by opening the AUTOEXEC.BAT
file and looking for the statement "Set Temp =". The name
after this statement is the Temp directory. It is usually C:
\TEMP by default, but can be redefined.
See the Microsoft Windows documentation that came with
the computer for more information about Windows error
messages.
ENWW Solve common Windows problems 227