Select the Advanced tab and click the Settings button under Startup & Recovery. You can choose the default operating system that boots automatically and select how long you have until it boots. If you want more operating systems installed, just install the additional operating systems on their own separate partitions.

Can I boot 2 operating systems at the same time?

While most PCs have a single operating system (OS) built-in, it’s also possible to run two operating systems on one computer at the same time. The process is known as dual-booting, and it allows users to switch between operating systems depending on the tasks and programs they’re working with.

How do I open a second operating system in Windows 10?

To switch between Windows 7/8/8.1 and Windows 10, just restart your computer and choose again. Go to Change a default operating system or Choose other options in order to choose which operating system you want to boot by default, and how much time will pass before the computer automatically boots the default one.