Instead of a manual download, the following methods are safer for resolving missing file errors:
libssl-1_1-x64.dll almost always requires a companion file, libcrypto-1_1-x64.dll , to function. Downloading one without the other rarely solves the underlying issue. Recommended Solutions libssl-1_1-x64.dll Download
Insecure libssl-1_1-x64.dll installed with Power BI Desktop July 2025 Instead of a manual download, the following methods
An application requires a specific sub-version of OpenSSL 1.1 that is not currently installed. Common causes include:
Downloading individual DLL files from "DLL aggregator" websites is generally discouraged by security experts for several reasons:
This Dynamic Link Library (DLL) is responsible for implementing the and TLS (Transport Layer Security) protocols. It provides the "handshake" and encryption logic that allows applications—ranging from web browsers and email clients like Mosquitto to development environments like Qt Creator —to communicate securely over a network. Why Errors Occur
Users typically encounter errors such as "The program can't start because libssl-1_1-x64.dll is missing" when a program expects the library to be present in its installation folder or the system PATH but cannot find it. Common causes include: