comctl32.dll
This file is not a system component: windows itself, 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 Windows Common Controls: the buttons, list views, progress bars and tree views that ordinary Windows programs are built from. It ships with every version of Windows and always has.
Where you see it: Old applications, and programs whose manifest was lost or edited. Also in build errors when a project cannot find the version 6 headers.
There are two of these on your machine at once and that is the whole story. Version 5 lives in System32 and version 6, the one that looks modern, is delivered as a side-by-side assembly that a program only gets if its manifest asks for it. So an application that suddenly looks like Windows 98, or that fails to start citing comctl32, usually has a manifest problem rather than a missing file. Dropping a downloaded comctl32.dll into System32 will not give you version 6 and can break other programs, because you would be overwriting a file Windows owns.
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.