libeay32.dll
This file is not a system component: the program that uses it, not a download. Restore it from the source that installed it rather than downloading a replacement.
If the file is already there and Windows still complains, read the message again: “entry point not found” is a different problem from a missing file, and installing the runtime again will not solve it.
Do not download this DLL on its own
Searching for a missing DLL by name leads to sites that hand you that single file. It is one of the oldest and most effective malware delivery methods there is, and a system DLL from an unknown source is indistinguishable from a deliberately modified one. There is never a legitimate reason to obtain a runtime component that way.
The same goes for the tools that offer to do it for you: what a DLL repair tool can and cannot actually fix.
What it is
The cryptographic half of OpenSSL 1.0.x on Windows. The odd name is historic: OpenSSL began as SSLeay, and the Windows build kept the old "libeay" name for the crypto library long after the Unix side had settled on libcrypto.
Where you see it: FTP clients, database tools, mail clients and anything else that speaks TLS and bundles its own OpenSSL rather than using Windows.
This file is not a system component and Windows has never shipped it. It comes inside the application that needs it, so a reinstall of that application is the fix, and pulling a stray copy off a download site means running unknown cryptographic code, which is about the worst category of file to accept from a stranger. There is also a good chance the error is a version mismatch rather than a missing file: OpenSSL 1.1.0 renamed libeay32 to libcrypto and ssleay32 to libssl, so a program built against the old names paired with newer libraries will report exactly this, and only a build that matches will resolve it.
Why there is nothing to download here
There is no verified download we can offer for this one, because installing a file is not the fix. The steps above are what actually resolves it. That distinction matters: the sites ranking for this file name are selling a download that would not have helped even if it were safe.