---
title: "Unable to Install Popups, received error message \"unable to add print processor\""
slug: "unable-to-install-popups-received-error-message-unable-to-add-print-processor"
updated: 2024-03-28T12:24:49Z
published: 2024-03-28T12:24:49Z
canonical: "kb.pharos.com/unable-to-install-popups-received-error-message-unable-to-add-print-processor"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://kb.pharos.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Unable to Install Popups, received error message "unable to add print processor"

Unable to Install Popups, received error message "unable to add print processor"

---

Manually remove the 9x Popups for Uniprint 6.0 using the following commands:

1. Open the registry and locate the following key:

HKEY_LOCAL_MACHINE\Software\Pharos
2. Delete the entire registry key entry.
3. In the registry locate the following key:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Print\Environments\Windows 4.0\Print Processors

Remove the Uniprint Print Processor entry in the list.
4. In the registry locate each of the printer entries and change the print processor to "WinPrint".

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Print\Printers

Change the Print Processor to "WinPrint".
5. Exit the registry and reboot the machine.
6. Upon restart access remove the following file:

\windows\system\unpcp95.dll
7. Reboot the machine and reinstall the Popup Client application.

## Related

- [Uniprint: Unable to print zero length job errors](/uniprint-unable-to-print-zero-length-job-errors.md)
- [Unable to start Pharos Database Server Service](/unable-to-start-pharos-database-server-service.md)
- [Error message "Unable to connect to the Popup Server, unable to locate the port number."](/error-message-unable-to-connect-to-the-popup-server-unable-to-locate-the-port-number.md)
- [PrinterInstaller error: Unable to find the port:PharosPort](/printerinstaller-error-unable-to-find-the-portpharosport.md)
- [Xerox iMFP: Authentication failure with error "Unknown error unable to authenticate".](/xerox-imfp-authentication-failure-with-error-unknown-error-unable-to-authenticate.md)