OK, I use Windows when I absolutely have to, but most of my computers defaulted to Windows instead of Ubuntu. That was an annoyance if I wasn’t sitting waiting at my computer.
Here’s the solution:
Ubuntu is not installed as the default boot option, you have to select it in the Windows boot menu. To change that, in Windows XP go to Control Panel > System > Advanced Startup and Recovery and edit the “Default Operating System”. If you want, you can change the timeout as well. Be aware that changing the timeout to zero (0) may cause issues booting into Windows. It is preferable that the value be set at 10 or higher.