install ubuntu along windows not showing up , even with unallocated space
#Make sure your partition table is GPT (GUID Partition Table) not
#MBR (Master Boot Record). The partition table can be checked with
#Gpartedlive CD, which is an open-source tool to edit partitions. If
#is MBR, then it can be converted to GPT with GPartedlive,
#however the current version the CD will erase windows operating
#system during conversion therefore backup must be made or alternative
# commercial tools are available which retains OS during convertion.
#see the reference link for these tools.