no boot menu after dual boot ubuntu 13.04 with preinstalled windows 8
i have a windows 8 preinstalled dell 15r 5521 laptop... I created a
bootable usb using Universal usb installer but did not give any persistent
storage space...next i created a free space (15000mb) by shrinking a
volume on my hdd...i did not make any changes to secure uefi as i dont
know what is it....then i booted from usb n selected "something else"
option...also the menu does not show "install alongside windows 8
option"...dont know why...created a swap area of 1500 mb with "logical
partition" and then used remaining free space as primary partition and
"Ext4 journaling file system" and mount point " / "...then installed
ubuntu on this partition...it installed correctly but when i restarted the
laptop, it automatically loaded windows 8...no boot menu was
displayed...when i tried to reinstall ubuntu 13.04 i found that ubuntu is
already installed...it occupies 3-4Gb out of 15 Gb of space...when i try
to access G: drive(ubuntu drive) it shows "you need to format the disk in
drive G: before you use it" error msg...what should i do...please help