I have two HDDs. First HDD has four partitions with Windows XP in the first partition Second has two partitions and 15GB unallocated space. I tried to install Ubuntu 12.04 LTS in the second HDD by using Unallocated space. I tried for 6 times. Each time it got installed, but after first restart, it directly boots Windows XP in the first HDD and no boot options appear. Every time I found that the Ubuntu installation used unallocated space and made two partitions one EXT3 and other Linux swap. I don't know what went wrong. During Installation, Ubuntu detected Windows XP. Can anybody help me?