I am running Windows 2008R2 as a print server and noticed that the following error keeps appearing:
Faulting application name: PrintIsolationHost.exe, version: 6.1.7600.16385, time stamp: 0x4a5bd3b1
Faulting module name: hpzuiwn7.dll, version: 0.3.7071.0, time stamp: 0x4a5bdfcb
Exception code: 0xc0000005
Fault offset: 0x00000000000d6971
Faulting process id: 0x534
Faulting application start time: 0x01ccf19af2bb7704
Faulting application path: C:\Windows\system32\PrintIsolationHost.exe
Faulting module path: C:\Windows\system32\spool\DRIVERS\x64\3\hpzuiwn7.dll
Report Id: 306a6540-5d8e-11e1-bd1d-005056b60001
I do not see hpzuiwn7 as the print processor listed for any of our printers, does anyone know how to get rid of this error? We have to restart the spool services more often than normal (once or twice a week) and in reviewing the event viewer I came across this.
Thanks for your assistance.
In earlier versions of Windows, printer drivers were run by the spooler service. A faulty driver would crash the spooler, but not the entire system (as happened before Win2k). In W2008 each driver is run by its own instance of PrintISolationHost, so the spooler no longer crashes if the driver is faulty. Instead that instance of PrintIsolationHost crashes. The benefit is that other printers are not affected, as the spooler is still running.
The fix should be the same as for spooler crashes: replace the driver. This is normally done by a complete reinstall (i.e. removing the driver files after deleting the printer). That may work in this case as well, but if the driver has a built-in fault, then the best way is to replace it with a different one, as suggested in the link I posted.