As we all know, Windows Vista is an advanced operating system that has become a popular choice among the Windows users. Because of its complexity, some users find it difficult to operate and have another operating system installed on their PCs so as to make a switch from Windows Vista to the other operating system anytime they want it. For this reason, users are always anxious to know about how to specify the default operating system for start-up on a Windows Vista-based PC.

Here are the simple steps using which one can easily set an operating system as default on start-up on a Windows Vista-based PC.

1. Click on the “Start” button
2. Select “Control Panel”
3. Click on “System and Maintenance”, and then click on “System”
4. Click “Advanced System Settings”, and then Click “Continue” in the User Account Control dialog box
5. Click the “Advanced” tab, and then, under “Startup and Recovery”, click “Settings”
6. Under “System startup”, in the “Default operating system” list, click the operating system that you want to use when you turn on or restart your computer.
7. Select the “Time to Display list of operating systems” check box, and then type the number of seconds for which you want the list displayed before the default operating system starts automatically.
8. Click “Ok” and then click “OK” again

The above mentioned simplified steps can easily let you set any operating system as default, and the next time when you boot your system, you can easily work with the operating system that you have set as default on a Windows Vista-based PC. For using the other operating system installed on your PC, you need a reboot of your system and select the other operating system while the system is booting to work with the other OS. You can also check the below-mentioned URL for further clarity on the above.