You need to download Visual C++ 2005 Express Edition, available at the time of this writing at http://lab.msdn.microsoft.com/express/visualc/. Alternatively, you can order a CD online from http://lab.msdn.microsoft.com/vs2005/get/order/. In addition, you need the following:
PC with a speed of at least 600MHz (1GHz recommended)
Windows XP, Windows 2000, or Windows 2003 Server
At least 128MB of Random Access Memory (RAM) (256MB recommended)
At least 1.3GB of hard disk space
A display capable of 800×600 256 colors (1024×768 high color, 16-bit recommended)
Microsoft mouse or compatible pointing device
A CD or DVD drive is required.