grub problems?

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http://askubuntu.com – i have a problem, i have dual boot system with windows 7 and ubuntu. i decided to try out linux mint. but after a while i removed it by deleting it´s partition. when i restarted, the bootloader didn´t work anymore. i reinstalled linux mint so that i could use my pc again. but i really want to remove mint from my system. is there a way to delete mint and still be able to boot in to ubuntu ? (HowTos)