Help please out of my depth now! Bootcamp Problems

Hello,

Please help, I've been trying unsuccessfully to partition my partners iMac and install windows. I've done this before on my machine and had no problems. Initially when running boot camp I kept getting the message that the startup disk cannot be partitioned or restored. I've checked countless forums and done what many have suggested but with no luck. On a bit of a whim I went ahead and followed advice from one of the answers on this site and it advised to go to terminal and type in the following - diskutil cs covert disk0s2

which I did and then this is what it said

Last login: Sat Jul 11 17:02:09 on ttys000

Nigels-iMac:~ nigelquaini$ diskutil cs convert disk0s2

Started CoreStorage operation on disk0s2 Macintosh HD

Resizing disk to fit Core Storage headers

Creating Core Storage Logical Volume Group

Attempting to unmount disk0s2

Switching disk0s2 to Core Storage

Couldn't unmount disk0s2; converted volume won't appear until it's unmounted

Core Storage LVG UUID: 8E8C8D35-0F2F-44DD-86EE-96DA41D5E061

Core Storage PV UUID: 52B1019F-C879-4DB4-BB75-7FD390B52E1E

Core Storage LV UUID: 7AFCB78D-9F34-48EB-AA03-5BBA64B3BBBC

Finished CoreStorage operation on disk0s2 Macintosh HD

Nigels-iMac:~ nigelquaini$

Now when I go to disk utility the Macintosh HD is in red and the volume below is greyed out, I'm worried about what I have done. Please help!!!!

Thanks.