Can you run a two operating system on a single screen at the same time?

Two operating systems can be ran on the some computer provided that the computer's hard drive it broken down into more then one partition or there is more then one drive on the computer. There is a setting with in Windows that gives you a change log into an alternate operating system with in a set time frame or it will automatically log into Windows. You will not be able to run two operating systems on the same partition due to the fact that only one can load at a time. Also you need have a way of separating the file structures for each operating system. Some operating systems such as ubuntu will also let you access files from either operating if the drive has the right number of partitions.