Yes, but that is OK I think. Path etc were already correct, no files copied to system32. I've located on how to trigger the issue: - Installing the new US in folder "uniserver" - Older version in folder "server" Running the new version, start without errors, but no curl. cURL is enabled, but not working, but also not showing errors. When i shutdown the new version, start the old version, stop and shutdown the old version, restart the new one, it throws the above DLL errors. So basicly I can run a fresh installation of US with cURL enabled, without errors, but cURL not working (weird?). After working in the old version, the new one gets corrupted and throws errors.