Wmvcore.dll errors are caused by situations that lead to the removal or corruption of the Windows Media Playback/Authoring DLL (the wmvcore DLL file). In some cases, these errors can indicate a registry problem, a virus or malware issue, or even a hardware failure.
wmvcore.dll is missing windows 10 Fix the problem
Follow these steps in the order they are listed below to try the most likely solutions first.
Recover wmvcore.dll from Recycle Bin. The simplest possible cause of a "missing" wmvcore.dll file is that you accidentally deleted it.
If you suspect this, but you've already emptied the Recycle Bin, you may be able to recover the file with a free file recovery program.
