i am reading a book C# and has a chapter about db's...it needs northwind db or something like that and seems like i dont have it installed...the book says that if i dont have it installed then i'd have to go to START > PROGRAMS > .NET SDK > SAMPLES AND QUICKSTART TUTURIALS and then click in:

Step 1: Install the .NET Framework Samples Database
Many of the QuickStart tutorials illustrate how to manipulate a SQL Server database using SQL and ADO.NET. To run these samples, a SQL Server instance is required. Clicking on the above link will install a standalone database tailored for the QuickStart tutorials.

the problem is that i clicked and it started an installation but it freezed and i made ctrl alt del...now when i try to install it says the other installation is in progress..what do i do now