read only file

When I went into any existing word or excel document and tried to change anything and save the document I couldn't because all of the previous files were changed to "read only" documents. I have no idea how all of the documents got changed to "read only".

I guess is that the documents were changed to Read Only when they were saved on a CD. That is usually what happens to files that are saved to a CD, they become Read Only because a CD does not allow files to be changed. To change back to normal you can do with three step like this: step one, If all the documents are in the same folder, just open that folder and click on one of the documents; step two, hold down the "Ctrl" key on your keyboard and press the letter A. Ctrl+A is a keyboard shortcut for "Select All". All the files should now be highlighted; last step, Right click on any one of the highlighted files and click on "Properties", click to remove the checkmark from "Read Only" and then click "OK"