Download the QEMU program (from http://www.h7.dion.ne.jp/~qemu-win/) and install it into a directory on Windows. I use C:\QEMU.
# Verify that C:\QEMU is in the path
# Create a "base" directory to handle all your Virutal Machines. In my case, I selected C:\Virtual. I also create a subdirectory for each virtual machine I'm going to build.
# Create a base directory for the ISO images (CD-ROM images). You'll need this path for the batch file.
# Create a batch file (.CMD extension) to launch your virtual machine. Below is my batch file (AKA, a script) to launch Damn Small Linux (DSL) version 1.5.