Upon upgrading Windows 10, you may get a lovely error about WMVCore.dll being missing.
Alternatively, you may get the same error when trying to load a particular program.
The short version is that WMVCore.dll is a key component of the Windows Media Library.
It’s a file that more or less allows playing media files.
Fortunately, it’s pretty easy to restore this missing file and get back on the road!
So you get Windows 10. You share your media libraries so other users on your network can see and play your music from Windows Media Player on their own puters.
Unfortunately, when they try to browse your music, WMP connects but quickly declares that your media library is empty!
You double-check the sharing settings, blah blah blah…
What’s going on?