Please boot your installation CD and select to "try Ubuntu". Then, open a terminal by searching for "Terminal" in the launcher. Then, run the following command, one-by-one.
sudo add-apt-repository ppa:yannubuntu/boot-repair && sudo apt-get update
sudo apt-get install -y boot-repair && boot-repair
boot-repair from the terminal.
Use the "Recommended repair", and it will do a repair and give you a URL(If it prompts you to install
pastebinit, then do so. Please post the URL here.
Also, if you get worried about Windows doing a chkdsk, read the following quote:
It should be noted for those new to Linux though that when you start Windows after using this tool it will run chkdisk on the windows partition, so don't panic.