I was already using windows 10 in 1/3 partition of my computer and rest 2/3 space was unallocated. Then I tried to install Ubuntu in rest of the partition. During the installation process I created partition of 300 gb(1/3 of the total space in pc) leaving behind some 300 gb unallocated. And I also created a swap of 600 mb before the partition of Ubuntu. Now I want to know that how would I access the Ubuntu operating system as whenever I turn my computer on, it always boots with windows.