opengl32.dll
This file is not a system component: your graphics driver, not a dll 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.
And if the box says RUNDLL rather than naming a program, the fix runs the other way: something left an instruction behind pointing at a file that is meant to be gone, so restoring the file is the wrong move.
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 Windows OpenGL interface. Windows ships a basic software implementation of it, and your graphics driver replaces it with the real hardware-accelerated one when you install the driver.
Where you see it: Games and 3D software on a fresh Windows install, or on a machine running the generic display driver Windows installs by default.
Downloading an opengl32.dll into the game folder is the single most common bad advice for this error, and it gives you a software renderer at best. The file that matters comes from your GPU driver. Install the current driver from NVIDIA, AMD or Intel directly, reboot, and the error goes. On laptops with two GPUs, also check that the program is being run on the dedicated card.
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.