Since you are new to this, I suggest using VirtualBox. VirtualBox is a x86 Virtualization s/w from Oracle. VirtualBox is easy to use and offers decent options.
Here are the instructions for installing VirtualBox on Windows Host. It's just like installing any other application on Windows. You can download VirtualBox for Windows from here and double-click on the executable.
And the instructions with screen shots for installing Windows 7 in VirtualBox. The article is a bit old, but the instructions and the screen shots are more or less remain the same.
With the default installation, the guest is not aware that it's running as a guest. You can install additional s/w on the Guest called Guest Additions for Windows to make it more efficient.