How can I stop Ubuntu launching as the default operating system?

Q  I have a desktop PC on which I have installed both Windows XP and the Ubuntu operating system. Until recently Windows XP was set as the default operating system, starting automatically 10 seconds after the computer was switched on.

Recently, though, I was invited to upgrade to Ubuntu 11, which I did, and now Ubuntu is set as the default operating system (again starting automatically after 10 seconds). I can select Windows XP but I want to reset the boot menu so that Windows XP is shown as the default operating system.

I have tried everything I can think of but to no avail. I have even asked a friend who specialises in IT to help but he is stumped as well. I am not impressed with Ubuntu and would like to remove it from my PC but I fear this may be easier said than done. Can you offer any help?
Len Priestley

A  Uninstalling Ubuntu from a dual-boot setup isn’t for the faint of heart, as it involves tinkering (or rather, replacing) the master boot record. Besides, we’d need to know a bit more about the way everything is configured before preparing a response (so feel free to write back if you’re keen to get shot of Ubuntu).

In the meantime, switching things around so that Windows becomes the default operating system should be pretty straightforward. First, click the Software Centre icon on the left and search for and install ‘StartUp-Manager’, typing in your password when prompted.

Now launch Startup-Manager (click the Ubuntu icon at the top left, type StartUp-Manager and click the icon when it appears). Finally, on the Boot options tab, open the dropdown menu below the ‘Default operating system’ heading, choose your Windows XP installation and click Close.

Next time the PC is started, Windows should start automatically.