My windows 7 disappear

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http://crunchbanglinux.org – Hiits the 7 th time that I install win 7 , then I install Crunch linux and even if during the install it ask me " ei i found win vista and its better i put grub for master record " and I say Yes, nothing, when I restart Ive choice only of Crunch linux.I was using linux mint, Im not a Pro user, dont know how to edit stuffs but crunch looked nice heheIve 1 unique HD of 320 GB, 100 GB for win 7, then i left 200gb free, wanna put 100 for linux and leave 100 for backup of win 7 programs.So I tryed with guided partitioning or manual partitioning, nothing alwa (HowTos)