I decided to dual boot Ubuntu 11.10 and windows 7, after i restarted it I did not get the choice between Windows and Ubuntu. So I downloaded Startup manager and realized that windows was not on it. so I check fdisk -l and got this
Device Boot Start End Blocks Id System /dev/sda1 * 2046 42000383 20999169 5 Extended Partition 1 does not start on physical sector boundary. /dev/sda5 2048 42000383 20999168 83 Linux
I am not sure what I am supposed to do to get windows started.