Internal Compiler error when on Windows8

Unity Engine
,
1

Right, I’ve just yesterday installed Windows 8.1 and the latest Unity 4.3.4f1

I am trying to build a game that was previously published for the Mac (Standalone) - however, when I downloaded my project via the asset server I get this error:

Internal compiler error. See the console log for more information. output was:

There is no message after that. I opened the editor log and there it says:

- Finished compile Library/ScriptAssemblies/Assembly-CSharp.dll
Internal compiler error. See the console log for more information. output was:
 
(Filename:  Line: 0)

Double clicking the error doesn’t do anything either
please help!

EDIT: discovered it was tk2d causing this issue

1551747--91014--$h58duOs.png

2

EDIT: Never mind, it was my anti virus - after disabling it everything works (the antivirus did not like 2d Toolkit for some reason)