Follow these instructions to get to a command prompt (and backup your files if needed):
Follow the tutorial to check the letters of your drives (C:\, D:\ etc.) from Notepad's "Open File" dialog. They may be different in an environment like this: for instance your recovery partition may be labeled "C:", and your Windows 7 may be labeled "D:", although this is rather unusual.
You could try to repair your bootloader automatically by running the "Automatic Startup Repair". Run it three times to make sure. If it does not work, try to repair it manually. Open the "Command Prompt", and change directory to E:\boot, where E: is your Windows 7 install DVD (check the drive letter):
cd /d E:\
Run the following command, where C: is your System partition (check the drive letter):
bootsect.exe /nt60 C:
Then restart your computer. For any help ask us.