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I can't uninstall. It gives error: 1628: Failed to Complete Installation

Anonymous
2025-03-19T10:06:03+00:00

There is more than one user account.

I installed Zynaptiq Unveil software on my account (my session). It was not installed on other users.

PACE License Support and Bonjour were also installed with this software.

I wanted to delete the software.

Zynaptiq Unveil and Bonjour were uninstalled. But PACE License Support was not uninstalled. Error:

1628: Failed to Complete Installation

OS: Windows 11 Pro x64 24H2
3rd batch update implemented.

Windows for home | Windows 11 | Install and upgrade

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  1. Stefano Sirri 3,170 Reputation points Independent Advisor
    2025-03-21T09:46:25+00:00

    Thanks for the detailed info, Kiyoshi. Since Revo didn’t help and the service isn’t running, here are a few deeper steps you can try to fully remove PACE License Support and bypass the Error 1628 (Failed to Complete Installation).

    1. Run the Installer/Uninstaller as Admin in Safe Mode
    • Press Win + R, type msconfig, and press Enter.
    • Go to the Boot tab, check Safe boot, and select Minimal.
    • Click OK and restart your PC.
    • In Safe Mode, try uninstalling PACE License Support again via Control Panel or its uninstaller.
    • Afterward, open msconfig again and uncheck Safe Boot to return to normal mode.
    1. Microsoft has a tool specifically for fixing broken installs/uninstalls (Microsoft Install/Uninstall Troubleshooter Tool):
    • Download it from here:

    https://support.microsoft.com/help/17588

    • Run it and select Uninstalling.
    • Choose “PACE License Support” from the list (if present), or let it detect leftovers.
    1. If nothing else works, you can manually Clean Registry and Leftover Files:

    Registry:

    • Press Win + R, type regedit, and press Enter.
    • Backup the registry: File > Export.
    • Search for:

    PACE

    Interlok

    LicenseSupport

    Delete related keys only if you’re sure they belong to PACE. (You might see references under HKEY_LOCAL_MACHINE\SOFTWARE or Wow6432Node.)

    Files & Folders:

    • Check and delete any of these (if they exist):

    C:\Program Files (x86)\PACE

    C:\Program Files\PACE

    C:\ProgramData\PACE

    1. Check for a PACE Installer

    Some software (like iLok/PACE) can only be uninstalled via their own installer. If you still have the original Zynaptiq or iLok/PACE installer .exe, try running it again—it may give the option to remove or repair the installation.

    You can also get the latest PACE License Support installer here:

    https://www.ilok.com/#!license-manager

    Then run it and see if it gives you an uninstall option or repairs the install to make uninstalling possible.

    Let Me Know

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  1. Anonymous
    2025-03-21T09:19:51+00:00

    Yes, I tried it 2 days ago with Revo. It didn't work.
    The service isn't on. If it was on, I'd turn it off.

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  2. Stefano Sirri 3,170 Reputation points Independent Advisor
    2025-03-19T11:35:32+00:00

    Hi Kiyoshi,
    Thank you for reaching out!
    My name is Stefano and it’s my pleasure to assist you today.

    The Error 1628: “Failed to Complete Installation” typically occurs when trying to install or uninstall software and is usually related to Windows Installer issues. Since PACE License Support was installed along with Zynaptiq Unveil, it might still be in use or have leftover registry entries causing issues.

    Have you tried to uninstall it through third party softwares like Revo.
    You can get it for free at:
    https://www.google.com/url?sa=t&source=web&...

    ***Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.

    Let me know if this works for you.

    ___
    Please note that this is a public forum, I will be responding you in short period of time and regret for a delay in response. As I am merely a fellow user trying to provide insight and information that may be helpful to others.

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  3. Anonymous
    2025-03-19T10:31:49+00:00

    I tried uninstalling Bonjour and it gave me the same error. It also gave me the message that Mozilla Firefox was open.
    I closed my Firefox browser, closed all open applications, tried again.
    This time I managed to uninstall Bonjour.
    I also tried again to uninstall PACE License Support. It gave me the same error again.

    Failed to uninstall.
    Could it be that a service or an application is running in the background and giving me this error?

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  4. Anonymous
    2025-03-19T10:10:43+00:00

    screenshot

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