I have a setup like that. When you install two different OS's on one PC, right after the bios, you will get a message telling you to choose which OS to start. It also will automatically do it if you dont press the up or down arrow in 30 secondsA friend of mine has both Win 7 and a Linux OS (Ubuntu, I guess) in his computer. I know it is possible to have two Operating Systems in your computer. Though, I am curious about the potential issues you should be aware of.