Removing os choice from boot menu in windows

If there are two or more os choice at startup in windows and u onlonger want to use all and want to use only one os as default startup os then follow these steps

1.right click on my computer.
2.select properties.
3.then select advanced
4.select startup and recovery settings
5.go to edit. here you will see a notepad will open
6.then in that keep only these lines

Code:

"[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)\WINDOWS
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Professional" /noexecute=optin /fastdetect"

and delete the remaining lines

finished check by rebooting