My H: Drive is gone. After after installing Ubuntu 12.04 inside windows. When I installed Ubuntu 12.04 from USB inside windows in drive H: ( dev/sdv7) when the installation finished it said to restart, when I restarted I did not see an option to boot Ubuntu or windows. When it automatically booted into windows my H: drives is also gone. Now how can I dual boot to choose whether to boot Ubuntu or Windows. It shows nothing when the installation is finished and when I restarted my pc.