Go to the Control panel/System/Advanced. Select the last option (Start up).
At the top you will see a text line. This is your boot.ini. If you open it you can select the wanted line from there, as your default. If you then change the time to 0 secs, you will not be troubled with the choice menu again. You can also edit the boot.ini with notepad or wordpad. (it's in the root) Be careful that you know which line you are really not needing! I would suggest you make a copy of the boot.ini before attempting this simple procedure. Your final Boot.ini should read something like this, assuming XP is on your C. Drive.
[boot loader]
timeout=5
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" /fastdetect
At the top you will see a text line. This is your boot.ini. If you open it you can select the wanted line from there, as your default. If you then change the time to 0 secs, you will not be troubled with the choice menu again. You can also edit the boot.ini with notepad or wordpad. (it's in the root) Be careful that you know which line you are really not needing! I would suggest you make a copy of the boot.ini before attempting this simple procedure. Your final Boot.ini should read something like this, assuming XP is on your C. Drive.
[boot loader]
timeout=5
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" /fastdetect