Error 0x80070643 during Installation in Windows 11

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1

I searched the forum but couldn’t find a solution to this problem/error code 0x80070643:
The installation aborts with the above error code.
Writing to the registry seems to work, but according to the log, the msi package fails to execute (my interpretation):
[8578:9320][2026-02-07T12:35:01]e000: Error 0x80070643: Failed to install MSI package.
[8AA0:933C][2026-02-07T12:35:01]e000: Error 0x80070643: Failed to configure per-machine MSI package.
[8578:9320][2026-02-07T12:35:01]e000: Error 0x80070643: Failed to execute MSI package.
[8AA0:933C][2026-02-07T12:35:01]i319: Applied execute package: Cryptomator.msi, result: 0x80070643, restart: None
[8AA0:933C][2026-02-07T12:35:01]e000: Error 0x80070643: Failed to execute MSI package.

Cryptomator_20260207123448.log (11.3 KB)

2

Hi,

The installer should be a .exe not .msi

The error your getting is a generic windows error code. You won’t find it here. I found it using copilot.

3

The installer can be a msi as well, as msi is provided as download asset in in github releases.

4

Hmm;

I browsed through those files and didn’t see an MSI I must have missed it.

Regardless, if the MSI is not installing and getting errors the Logical Next Step would be to try and install the .exe file and see if it works.

5

Thank you very much for your quick help!
That’s right. I had used the MSI installer and thought the error code was from Cryptomator. Thanks for looking into it!
The exe installer continues to run during installation like the msi installer, but stops at the point where a new version of WinFSP is to be installed with a message saying that the old version must be uninstalled manually first. This in turn fails due to missing admin rights. I’ll have to talk to IT :-). Once the old WinFsp is gone, I believe the installation with the exe-file should run .
As a test, I tried to install the portable version. However, it gets stuck on the start screen (clicking “Next” shows no response).
Thanks again. Great community!

6

Hi @mge

You might not have to wait. It is not required that C install the winfsp.

You can download the most recent version from their website.

Winsfp and sshfs.

7

Hi@LeoW, thanks for pointing that out. However, during installation, the WinFsp installer also requires the old WinFsp version to be uninstalled manually before the installation can be carried out. This is ultimately identical to the Cryptomator installation.

8

Are you unable to go into Windows settings and uninstall the old version?

If so like there is a product installed but no uninstaller you can use a program called Revo uninstaller in what they call Hunter mode. Basically you point it at the directory in programs where the software is located and it determines what files are associated what registry entries are associated and attempts to forcibly remove the software.

Revo Uninstaller free download.

9

This in turn fails due to missing admin rights

Cryptomator cannot be installed without admin privileges. Neither the MSI nor the EXE installer are built for user-only installations.