The grub bootloader is a program that starts up the computer when the computer is turned on. It helps the user choose which operating system to start up. Recently, there have been some problems with grub bootloaders. They can sometimes not start up the computer properly, or they can take a long time to decide which operating system to start up. One way to fix this problem is to make grub wait indefinitely for an OS selection. This will help prevent problems with grub bootloaders and make it easier for the user to choose which operating system to start up. ..
All you need to do is open up the /boot/grub/menu.lst file in your favorite text editor (in sudo mode)
Find the section of the file that contains the timeout information
Just put a # before the “timeout 3” line in the file, then save and restart your computer.
Now grub will wait forever until you make a choice. This is especially useful if you want to prevent your computer from ever booting into Windows…
