Can't import any asset downloaded from asset store, Couldn't decompress package

Hi guys, can you help me with that problem? I’ve already tried reinstalling unity and even deleting cache from %APPDATA% and then redownloading the asset, but that didn’t work either.
I’m using: Windows 8.1 64 bit & Unity 5.1 64 bit.
Here’s my full error: Failed to import package with error: Couldn’t decompress package UnityEditor.Web.JSProxyMgr:smile:oTasks()

I have the same problem

I have found the solution :

Create a folder like “MyGames” in C:\ (At the root) and create your project in the folder.