To change the display Time of operating systems at win 7 or Win 8 and 8.1 boot, please use the Hot-Key Windows+R and enter the command control systemIn System select eg. click the text Advanced system settings (... see Image-1 Arrow-1,2 and 2 )
Info (c) Microsoft:
If you have more than one operating system installed on your PC, you can choose which one start when you turn on your computer. More than one operating system installed on a computer is often called a multi boot configuration.
FAQ 82: Updated on: January 23th 2014 22:19