Hello Sir !
I've two os i.e. xp service pak2 and Windows 7.
xp service pak2 is Default.
When i'm using Windows 7. I change the boot display time to 0 Seconds.
So, when i restart my computer i have only the choice list of xp service pak2
Will you please post a snip/screen-shot of the entire disk management drive map so we can see what you have going on as there may be a fairly simple way to resolve the situation.
In the Windows start menu right click computer and click manage, in the left pane of the "Computer Management" window that opens click disk management and post a snip of that.
Go to Start, rightclick Computer, select Properties, then Advanced Settings, then Startup. Change timeout to 10 seconds. Set Windows 7 as default if you want it to boot when no choice is made.