Update to the Windows Getting Started Guide.
Update to the Windows Getting Started Guide.

Added an instruction to install Visual Studio Update 4

dkorolev/llilc,adiaaida/llilc,marksantos/llilc,AndyAyersMS/llilc,marksantos/llilc,russellhadley/llilc,swaroop-sridhar/llilc,tempbottle/llilc,dotnet/llilc,AndyAyersMS/llilc,tempbottle/llilc,kyulee1/llilcjit,russellhadley/llilc,manu-silicon/llilc,dkorolev/llilc,tempbottle/llilc,dotnet/llilc,manu-silicon/llilc,JosephTremoulet/llilc,BruceForstall/llilc,dotnet/llilc,swaroop-sridhar/llilc,kyulee1/llilcjit,marksantos/llilc,adiaaida/llilc,dkorolev/llilc,BruceForstall/llilc,AndyAyersMS/llilc,swaroop-sridhar/llilc,manu-silicon/llilc,JosephTremoulet/llilc,JosephTremoulet/llilc,adiaaida/llilc,BruceForstall/llilc,kyulee1/llilcjit,russellhadley/llilc