I would reccommend uninstalling eM Client and “don’t delete the database” when asked on the uninstall wizard. Also if still exists after uninstall delete C:\Program Files (x86)\eM Client folder.
Then go to the following eM Client hidden database folder and rename it to eg: eM Client-Old. “Users\yourusername\AppData\Roaming\eM Client”
Then try running the Microsoft Installer / uninstaller troubleshooter which can sometimes fix issues with Windows registry and install issues etc.
Then reboot your Windows and try reinstalling eM Client again and setup as new from the release history page.
If that then works and you need to restore emails from your old database, you can either do a Partial Restore from the renamed hidden database folder or Partial restore from an eM Client backup as per my post in the following link.
If that still makes no difference as you have a paid eM Client version go to the VIP support page and login and lodge a support ticket.
it apears to be related to .net 8. I have reintalled .net 8 3 times now the first time it fixed it for a week..
but then .net * is missing again.. I do have .net 9 installed for VScode ..but windows 11 update I think is removing .net 8.
plus the error says its miss a file
If you think think Windows 11 update is removing .net 8 you would need to contact Microsoft support. We carn’t help with that.
All I can personally say is that the latest August
Cumulative Windows Update for .NET Framework 3.5 and 4.8.1 for Windows 11, version 24H2 works fine for me with eM Client V9.2 & V10.3.