So, I had a big problem installing El Capitan with a Boot Camp Windows partition, so I deleted this Windows partition before trying to upgrade again. This extra space from the partition was left as "free space". Now a few hours later, after upgrading, the Windows partition is still there when I press the "alt"-button at start up, but it just shows that the Windows install is broken when I try to start it up, of course. (It should've been completely gone, though) However, when I go to the disk utility program in OS X, it only shows one partition, Macintosh HD at 190 GB. The SDD I have is sized at 256 GB, but the remaining 60+ GB are nowhere to be found!! How can I get back the remaining GB into the Macintosh HD partition again? Is there any way, or do I have to make a completely clean install and then use Time Machine? If so, how do I do this? I can't lose any of the stuff that's on my hard disk now, but I guess Time Machine is the solution here? Please, if anyone knows what to do, help me. Kinda depressed here, after losing 60+ GB.. And I must say, the new disk utility app is terrible.