I have used the Blender Game Engine for a while now and wanted to see if there was something that could do more. I found Unity, which sounds promising.
I tried to add a plane to the main scene and lo and behold, Unity crashes!!! Everytime!!! Without fail!!! I tried it several times, using different objects, same result.
I got a Win7 Pro 64-bit, with 4GB ram and Dual Core 1.86GHz.
I have tried the uninstall/reinstall routine, and that did not help. Any ideas?
Unity is so much better than Blender’s game engine, you will enjoy it.
Can’t really tell what the problem is exactly… I have had a few issues with 4.2 as well… But no crashes.
I would suggest, reinstall 4.2 if you really want 4.2, and if that does not work, or if you don’t mind downgrading, try the latest 4.1.x http://unity3d.com/unity/download/archive
Hopefully that fixes it for now. 
Adding a Plane and Unity crashes? Does it crash even if you add a cube/sphere/import any model? Do you have Intel GMA video card?
Have you tried -force -d3d11 or -force -opengl switches for starting unity?
I use a Laptop, which has Intel GMA 950, Unity crashes if a cube/sphere is added or any model is imported. For me, until there is a fix, i will have to use Unity 4.1.5 as the directx 11 mode switches didnt work for me.
It crashes whenever I add anything to the scene. No I don’t have a GMA video card. I have a ATI FireGL V3100.
I am not even aware about the -force thing. Can you provide some details?
Have you tried going to 4.1.5 yet?
Start > CMD
(In the Command Prompt) (Assuming that you have installed Unity in Program Files ( the Unity.exe is in Unity\Editor))
"%programfiles%\unity\editor\unity.exe**“** -force -d3d11
or
"%programfiles%\unity\editor\unity.exe**”** -force -opengl
The Command runs the Unity in directx 11 mode or opengl mode.
Using these arguments seem to work for many others with the Crashing problem, I don’t have proper info on how they work (in Unity) but my guess is this command forces the Unity to run with the directx 11 libraries instead of the directx 9 libraries.
IF i’m wrong with my assumption, correction is appreciated …
Hello, im having issues with unity 4.2 too, same problems here.
I have tried the both CMD things but still crashed when i add cube.
I guess maybe my pcs is not powerful enough to run Unity 
was downloading unity 4.1.5 and hopefully that will works
Try WITHOUT space -force-d3d11 instead of -force -d3d11
It seems i added an extra space and some1 pointed that out … it didnt work for me though, i’m using 4.1.5
Same problem here. Does not matter what I try to add to a scene, it crashes. I’m using no 3rd party stuff, nothing fancy at all. Tech support told me this last week that this would be fixed in the next release, but that could be a problem. I’m on my 30 trial and the days are counting down while I wait and wait… Btw: the above fixes did nothing to help. 
It’s too bad, I really thought this was what I’ve been looking for…
I had a similar problem. Seems to be an issue with DirectX7.0, as told by replys to bug reports. I found a work around where I went Edit>Graphics Emulation and where it was “OpenGL 1.0ES”, I changed it to “OpenGL 2.0ES” and it fixes this issue. Hope this helps.
EDIT (26/11/2013): Updating to 4.3 fixes the issues, but removes OpenGL 1.0 ES support
This work for me THX