This question already has an answer here:
I accidently installed Ubuntu 12.10 using the option "LVM" although i've not selected erase disk and fresh install. Now my systems boots direclt into Ubuntu and I'm unable to see my Windows files on hard drive so I'm unable to access my old data (documents, movies, music, pictures) stored on Windows? Can someone help me to bring back my old Windows?
In fact, I've now completely erased my hard drive yesterday and its only ubuntu 12.10 running on my laptop and i surely want to install my paid windows 7 home premium back as a dual booting system. But I also like to first try uninstall or revert my ubuntu installations and get back my windows so that i'll able to at least retrieve my previous data and than perform this new task.