How to set default OS when Dual Booting with ubuntu 10.10

When you install a dual-boot of Ubuntu, one of the frustrating things that you’ll immediately notice is that Ubuntu is now set as the default operating system in the Grub loader. There’s an easy way to switch back to using Windows as the default.

There are many way to change bootup options

This is one way to change bootup option

First you have to go System > Administration > Startupmanager if it is not there

Go to Applications > Accessories > Terminal and install startupmanager using the following command.

sudo apt-get install startupmanager

Now once agin you have to go System > Administration > now you will see a new Startupmanager button, just press that startupmanager button it will open a window

Enter your password to perform administrative task “now you have to give your password and press enter now you will see startUp-Manager window
in that you will see Timeout Timeout in seconds: by default it is 10 second if you want, you have to increase the second10,20 etc..

Default operating system: by default it is Ubuntu

if you want to change click the Tab and you will see five options that is

Ubuntu with Linux generic
Ubuntu with Linux generic(Recovery mode)
Memory test (memtest86+)
memory (memtest 86+, serial console 115200)
Microsoft Windows XP Professional (on/ext/sda1)

and now you go to Microsoft Windows XP Professional (on/ext/sda1) and click it

now it will change Ubuntu to Windows XP

just press close tab

after closing that window

you have to restart your system just wait for 10 seconds and see now your system will boot windows xp by default.