Possible Duplicate:
Accidently installed grub to usb
I installed the latest version of Ubuntu on my VAIO laptop to use Windows 7 and Ubuntu at the same time. I chose the option said "Install Ubuntu alongside Windows 7".
After finishing the installation, my system was restarted and it boots and starts up with Windows. In other words, I do not have the Ubuntu option.
What should I do? I appreciate your help.