If you come here for a solution. I don’t quite have one yet. This appears to be a tough one and I figure it may save time letting other techies know what will NOT fix this as they troubleshoot.

iPrint Logs

First off, for those who don’t know, iPrint has lots of debug logs available. The first place to look when problems occur is in the C:\NDPS\ippErrs.txt (typically). The main errors I see when this happens is the following:

Module:     spoolsv.exe
Trace Info: registry.c, line 4192, thread 000005E4
Routine:    FindDriverAndGetInfo – RegOpenKeyEx failed
Error:      The system cannot find the file specified.

Module:     spoolsv.exe
Trace Info: ippmain.c, line 6461, thread 000005E4
Routine:    GetDriverInstallInfo – DrvInstall failed -536870353
Error:      iPrint Driver Install – Unknown installation error (-536870353).

Further logs are available if you enable iPrint tracing. In short:

a. At a Command prompt, type:


b.  Check the “Enable iPrint Trace” option.
c. Restart the workstation, or at a Command prompt, type


d. Duplicate the problem
e.  Uncheck the “Enable iPrint Trace” option.
f.  Reboot the workstation.
g. Get the files C:\NDPS\IPPTRACE.TXT and C:\NDPS\USERS\username\iexplore.exe\IPPtrace.TXT

Attempts at troubleshooting:

The following have NOT worked for resolving this:

  • Upgrading to latest iPrint Client (I have tried 5.40, 5.82, latest version as of today)
  • Disabled driver signing warnings/prompts. On one of the desktops with this problem, it DID complain about driver signing policy:

    Module:     spoolsv.exe
    Trace Info: ippmain.c, line 6373, thread 00000568
    Routine:    GetDriverInstallInfo – failed to set Driver Signing Policy (2)
    Error:      The system cannot find the file specified.However changing the policy in Control Panel -> System -> Advanced did nothing

  • Removing existing installed drivers for those printers (Printers and Faxes -> File Menu — I believe)

My Logs

I will include my logs for anyone to compare against. If I get time I will have to see what differences there are between a working similar desktop.

ippTrace.txt (c:\ndps)
ippErrs.txt (c:\ndps)
ippTrace.txt (C:\NDPS\USERS\username\iexplore.exe\IPPtrace.TXT) – Did not save, unaware of this one.


  • Any solution to this issue? I have the same problem…