In Dual Booting how can you Default you Windows

For that install 'Startup Manager'.

1. System -> Administration -> Synaptic Package Manager (if here request password put password).

2. Here have a search icon click here and write 'startup manager' then click search.

3. For that it will be download and install.

4. Now to Default your XP Go, System -> Administration -> StartUp-Manager-->Boot options Tab-->Then select you choose able Default 'operating system'.