Can't code in C#

Hey guys
I opened a new project in Unity and when I created C# script the console displayed that cSharp.dll.mdv is missing. I restarted unity, deleted and installed it again to no avail. Please help how do i fix this?

Try uninstalling it completely, use ccleaner to clean the registry (its free), and go to installation folder (usually C:\Program Files) and shift delete unity folder. But do a legit uninstall before deleting actual folder.