In debugging problems, it can be a lot easier to identify common issues (and correlations in problematic hardware) if a dxdiag file is included. So, if you're reporting a crash on PC, please include a DXDiag file:
Press Windows Key + R, type DXDiag and press enter
Click Save All Information...
Save that to the desktop
Open the new DxDiag.txt on your desktop file in notepad
Go to http://flock.pastebin.com in a web browser
In the large text box, describe the problem you encountered (what was the crash message? when did it crash? what were you doing when it crashed?)
Copy and paste all of the text from DxDiag.txt to the end of your write-up in #6
Enter your Unity name and click Send
Post the URL to your posted DXDiag in the approriate thread so we can review it
Thanks, hopefully this will help us identify issues when they come up :)