How to boot from ubuntu 12.04?

view story

http://askubuntu.com – When I buy laptop recently,it already install win7. I remove D to install ubuntu 12.04 64 bits. At first I only set partitions like this,and I don't change any other partitions related with win7: swap 16GB / 150GB But I got this message: The partition table format in use on your disks normally requires you to create a separate partition for boot loader code. This partition should be marked for use as a "Reserved BIOS boot area" and should be at least 1MB in size. Note that this is not the same as a partition mounted on /boot. So I try to add one partition: biosgrub 1MB And (HowTos)