i have win 8 on my acer laptop, as it have hanging problem i tried to change my operating system. For that i inserted win 10 cd and i tried to install on c drive it said that i cant install on any partition, so i deleted the c drive partition so that i can create a new partition and i can install but it is unable to create a partition on same space, it is showing that it has 155gb free out of 155gb. how can i solve this problem and i how can i install win10