I have installed the window 8 on my computer, all of my software have compatible with this version of windows, but my Civil 3D software dos not work propperly. The "Close Program" is the software massage during the software staring phase.
Windows 8 is not currently one of the supported operating systems for Civil 3D although I imagine that it will be supported in the future.
There is another thread on this topic. Seems people are having different results running Win8 & C3D2013 on different machines.
Here's the official line from Autodesk: http://usa.autodesk.com/adsk/servlet/ps/dl/item?si
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