Yes you can cancel a currant install by holding down the power button for 10 seconds. Then just start over the install from scratch. good luck, it happens to all of us at some point.

How do I go back to Windows after installing Ubuntu?

1 Answer. Use the up and down arrow keys to select the option that says Windows. It might be at the bottom or mixed in the middle. Then press enter and you should boot into windows.

How do I exit Ubuntu from Windows?

If you just intend to get used to Ubuntu then install Virtual box on Windows and create a virtual machine on which you can install Ubuntu. You will literally exit from Ubuntu back to Windows in this case. You can lookup the documentation for Virtual box on how to setup VMs on it.