Error in verbose mode using fsck

Question

It says
***** FILE SYSTEM WAS MODIFIED*****
:/ root# exit
logout
and now it's endlessly displaying diskOs2: media is not present

Answer 1

We don't know whether this tutorial was written for Photoshop or Photoshop Elements, more specifically for which version of PSE. There are differences. Be sure to have the layers palette open.
Try this instead
Open picture B, the one you wish to select something from to add to another picture.
Use one of the selection tools, e.g. selection brush, lasso tool, to select the object. You will see an outline ("marching ants") once the selection is complete
Go to Edit menu>copy to copy the selection to the clipboard
Open picture A, then go to Edit>paste
Use the move tool to position object from picture B.
In the layers palette you should see picture A as the background layer, and object B on a separate layer.
To unlock the background layer, double click on it in the layers palette. Perhaps your tutorial will  guide you through the process.