Strange crash on package import

Hi all,

I have very strange problem with Unity. When I try import some packages Unity freezes and a bunch of different programs are launched (many instances of each one). For example: audio manager, calculator, accessibility programs, system tools along with some strange invisible processes called Msg and even some processes with unreadable Japanese or Chinese (not sure about that - I can see only some hieroglyphs) titles. As I mentioned above this only happens when I try to import some packages. Can it be Unitypackage contains some virus? Is it possible at all?
Thanks in advance.

First of all, is your Unity legitimate? If so you may have associated *.unitypackage with another program. If that is not so, your computer has a virus.