Thank you for the suggestions
@Hawkeye22, I download the EasyBCD and it sort of help.
I managed to delete the second window 7 with only 320 GB in EasyBCD.
However, now when I start Windows, I still see 1 option Windows 7 to choose.
How can I start my computer without asking me to choose the 1 only option and go straight to Windows 7?
Can I do that with EasyBCD? and How?
Thank you all again for chimming in. Appreciated.