If you installed more than one operating system on your computer (known as a dual-boot), such as Windows XP and Windows Vista, you can select the default operating system you want to use when you start up your computer. You can also specify how much time to display the list of operating systems for a dual boot before the default starts. If you have problems starting Windows, you can set options to instruct Windows what to do. You can set options to automatically restart and create a system log of events to track where the problem occurs.