I know how to install two operating systems, but the problem is, I only know how to set it up in a way that requires me to reboot the machine, and selecting an OS to boot up. So pretty much only one operating system can be actively used at a time.

I would like to run Windows 7 as the primary operating system, with Ubuntu as the secondary operating system. Ubuntu and Windows 7 both need to be running 24/7 in parallel.

There's just no reason for me to run a web server on any other platform than Linux, however, I need to be able to use Windows 7 for work and other miscellaneous programs.

What is the best route for me to take so that I can install Ubuntu Linux, so that it's always running, while still allowing me to run Windows 7 simultaneously?

Oh, as a side note, I also occasionally play video games, so I would like it if Windows 7 ran smoothly. I've had a terrible experience with wine in the past, but if that's what's recommended, I guess I'll use that then.

I'm sure it's hard to formulate a real concrete answer, but any information to guide me in the right direction would be much appreciated.