I had been running Windows Vista as my operating system. Recently i had installed Windows 7 on my machine. Now the problem is that after finishing the Windows 7 installation process, it doesn't give me an option to choose whether should I boot window 7 or Window Vista. I have checked my hard disk, there is a partition on Window Vista left and all files are there but it seem that I can't boot back to Window Vista. Can any one tell me that why does my Windows Vista seems to be missing after installing Windows 7? Any one has any idea about it? Kindly help me out to get rid of the above issue. Thanks.