Removing Debian Installation Prompt

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http://unix.stackexchange.com – I attempted to install Debian through a CD, with the initial .exe working fine. However, when I rebooted and went through the installation procedure, my system could not tell that there was a disk there (or the media was unreadable). Now whenever I boot up my computer, I get the choice between continuing on to windows or to complete my installation. How do I remove that choice? Do I have to go through BIOS or are the files on my Windows partition? (HowTos)