WMVCore.dll Missing problem for Cubase 5, 64bit in windows 8.1
the media pack would solve the problem after update.
Download Media Feature Pack for N and KN versions of Windows 8.1 from Official Microsoft Download Center
Here is the dotnet 3.5 download for those who have framework offline installer
Dev-Host - dotNetFx35_W8.1_x64.exe - The Ultimate Free File Hosting / File Sharing Service
Just posted this solution.