Windows 7 - boot option gone!!!!

i have two partition one has windows 7 and other windows developer preview, and running well. but when my windows 7 crash i used acronis true image to restore my windows 7.

but now i cannot find the booting option ask at the begining
choose operating system:
windows 7
windows developer preview

it directly loads windows 7

i try to check @ msconfig.exe in boot option, but there shows only windows 7 default boot.......
my windows developer preview is in another partition....

kindly please tell me the way where i can use both the os

thx
Ranjit

Take look at those tutorials:
http://www.eightforums.com/tutorials...ndows-8-a.html
http://www.eightforums.com/tutorials...ndows-8-a.html
http://www.eightforums.com/tutorials...ndows-8-a.html

thx theog for this all tutorials, and i have tried but there i cannot find the defualt os as windows developer preview.

now please help me start the windows developer preview while it is already installed

That partition with developer edition is still there and accessible? Try "startup repair" from recovery mode. Does it detect that windows version?

Do you try Refresh?
http://www.eightforums.com/tutorials...ndows-8-a.html

If you have EasyBCD installed on Windows 7/Win8, there's an option that says 'Skip the boot menu', make sure it's not checked