(preface: I'm not at all familiar with Windows, so bear with me) Hello, my current OpenVPN installation is borked, I can't connect to any server (I don't have the original error message in mind). My idea was to simply reinstall OpenVPN hoping that this would fix my issues. So I opened the Windows settings, clicked on Apps > OpenVPN > Uninstall. However, removal failed with this error: [img]https://imgur.com/download/tMEes4v/[/img] However, installing a new version of OpenVPN doesn't work either: [img]https://imgur.com/download/sDZxrjF[/img] So I removed the folder where OpenVPN was installed in, however, that didn't fix anything either. I already tried restarting my pc. What can I do now? Thanks for any help in advance.

Do you have a third party security product running ? Like Kaspersky

Try installing an older version, 2.4.x

That worked. Should I just stick with 2.4.x?

It would be better if we could work out why 2.5 fails but I don't really have any ideas .. You did not actually state the version of Windows you are using.

Windows 10 Version 2004 OS Build 19041.985

If installing 2.4 worked then you could try uninstalling and then install 2.5 I know these are basic steps but I don't debug Windblows.

No, installing 2.5 still does not work: OpenVPNMSICA: tap_create_adapter: DiInstallDevice failed Error -536870397

I posted a question to the users mailing list but have had no reply in 24 hours.

It is hard to say what is going on without seeing logs. To collect logs: 1) Install OpenVPN from the command line: [code]msiexec /i OpenVPN-2.5.2-I601-amd64.msi /L*V install.log[/code] 2) Post here (or somewhere) install.log obtained from previous step, as well as [code]C:\Windows\INF\setupapi.dev.log[/code]

Failed to uninstall driver: The operation completed successfully.

TinCanTech

Which version of Linux would 'lenni' be running ?

becm

Ok, not sure what state of Windows drivers wintun and tap0901 is at present.
My guess is according to a registry entry they are marked as installed and up-to-date, which is why they are now both skipped on install.

This seems not to be the case for tap0901, since the driver can not be found (at least the bad/old oem1.inf instance seems to be gone now).

If actual driver install state and Registry entries are out of sync, some manual registry patching will be required (version data in HKLM\Software).
Normally these entries are removed on OpenVPN uninstall.
I would advise to first check/supply the ouput of pnputil /enum-drivers and see if Wintun and/or Tap-Windows Provider V9 are listed/missing.

stipa

In case you want to build openvpn/installer yourself and experience difficulties - we do windows build with github actions, maybe this could help: https://github.com/OpenVPN/openvpn/blob/release/2.5/.github/workflows/build.yaml

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