msvbvm60.dll
This file is not a system component: visual basic 6 runtime, included with windows. 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 Visual Basic 6 virtual machine, which every program written in VB6 needs in order to run. Windows has included it since Windows 2000 and still does.
Where you see it: Legacy business applications, old shareware and utilities from the late 1990s and early 2000s.
Because Windows ships this file, a missing msvbvm60.dll usually means the program is 32-bit and something is wrong with the 32-bit side of the system, or an uninstaller removed the file it should have left alone. Repair Windows with "sfc /scannow" first. Note that VB6 applications are 32-bit only: on 64-bit Windows they run under WOW64 and read the copy in SysWOW64, not System32, which is why manually placing a file in the wrong one of those two folders changes nothing.
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.