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I installed OpenVPN 2.4.x on Windows 10 and the latest version was too unstable so I wanted to uninstall it to go back to a stable version. However, uninstalling it from both the the uninstall.exe that came with the install and Control Panel both resulted in NSIS Error:

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How can I get rid of a program whose uninstall causes this error?

UPDATE: I reinstalled it and retried the uninstall after the reinstall but still get the same outcome.

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  • In order to solve this, you will need the same installer you originally used, do you have access to the OpenVPN 2.4.6 installer?
    – Ramhound
    Aug 20, 2018 at 17:36
  • yes, I tried but couldn't
    – amphibient
    Aug 20, 2018 at 17:39
  • So does that mean you have access to the file?
    – Ramhound
    Aug 20, 2018 at 17:40
  • Yes -- the original installer does not enable uninstalling
    – amphibient
    Aug 20, 2018 at 17:41
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    What are the contents of the installation directory? The error is caused by a CRC check failure. You can get around that by running the uninstaller with the /NCRC command option, in an elevated command prompt, or fix the integrity issue by reinstalling the same version then uninstall it normally.
    – Ramhound
    Aug 20, 2018 at 17:46

1 Answer 1

Reset to default
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There is a program called Revo Uninstaller, which may be of some help in this situation. It will try to run the original uninstaller, then go through a process to scan the Registry and hard drive for left over items.

You can find this program here: Revo Uninstaller on download.cnet.com .

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  • While this at first looked like some sketchy hackware from China -- it actually worked !!
    – amphibient
    Aug 20, 2018 at 19:38
  • It is sketchy hackware. You do more harm with then good with registry cleaners with shovelware like Revo Uninstaller.
    – Ramhound
    Aug 20, 2018 at 20:54
  • @amphibient It has always worked for me, and I have never had any problems with it. On occasion, it has been the only product that worked.
    – KennZAney1
    Aug 27, 2018 at 13:40

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