(Backup Line) boot option - what the?

[Meatball]

I have suddenly have had an extra boot option appear called:
(Backup Line) Microsoft Windows XP Home Edition

Before:
Microsoft Windows XP Home Edition
Microsoft Windows XP Professional Edition

After:
Microsoft Windows XP Home Edition
Microsoft Windows XP Professional Edition
(Backup Line) Microsoft Windows XP Home Edition

What is it? If I boot to that option it appears to be exactly the same as my normal XP Home

 

[Meatball]

Edit your Boot.ini file, delete the new line and all should be back to normal.

But why is it there in the first place?