How to Set Windows 7 As the Default OS on a Dual Boot PC

Click on the "Start" menu.


Go to "Control Panel."
Click "System and Security" link.
Click "Administrative Tools."
Go to the "System Configuration" tab.

• Choose "Boot" and click on the "Set as default" button to change its default. Make sure that your default OS is Windows 7.

Look at the "Timeout" settings and set this number to 0.
Click "OK" and restart the PC.