A Tragedy

I downloaded a skype installer just now.  After I installed installing it, my computer became A blue screen appeared on my monitor. I had to restarted my computer 3 times thrice and uninstalled the Skype software and my computer is okay (or formally, "functioning properly") right now.But I am so sad that I can't cannot use the Skype.

Let me ask you two questions? Is the Skype software downloaded from the official Skype site?  Are you using Windows OS?  What version are you using?  XP, Windows 7? And if so, are the OS legitimate?  This is the first time I hear that the Blue Screen of Death comes up upon installing the software.