I'm currently running Ubuntu 12.04 (10GB) and Windows 7 (450GB) in a dual boot configuration. I also have about 10GB of a partition for ASUS recovery, but I doubt I need it. I love Ubuntu so much that I want to make it the only OS on my hard drive. My question is, can I just use the liveCD to install Ubuntu and select the option in the installer to "erase disk and install Ubuntu" and have the installer delete my current dual boot of ubuntu/windows7 and everything off my hard drive? Also, if Im installing Ubuntu as the only OS, do I need to defrag my hard drive at all before I do this? Thanks for any help in advance!