"Incorrectly 'ejecting' a disk" refers to the fact that the computer is saying that you disconnected an external hard drive (probably your Time Machine external drive) while the Mac was running Without first selecting to "Eject" that external drive in Finder or Disk Utility. (OS X does NOT handle that well.) If so, you may have corrupted the external drive's data that you were trying to Migrate to the Mac. You Always have to eject an external hard drive Before disconnecting it from the Mac, if the Mac is On.
Hope this helps
Yes I realise an external drive must be ejected but when it was originally in set up mode, it never found the Time Machine back up disc after an hour so I pulled the external drive out and was surprised to see that it must have found the disc in some form as it mentioned the ejecting of it. How do I get the macbook to find the back up disc???