This procedure will check for files in your home folder that are locked or have a wrong owner. It makes no changes and will not, in itself, solve your problem.
Launch the Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ If you’re running Mac OS X 10.7 or later, open LaunchPad. Click Utilities, then Terminal in the page that opens.
Drag or copy — do not type — the following line into the Terminal window, then press return:
find . -flags +uchg,uappnd -o ! -user $UID
The command may take a noticeable amount of time to run. Wait for a new line ending in a dollar sign (“$”) to appear.
Post any lines of output that appear below what you entered — the text, please, not a screenshot.
If any personal information appears in the output, edit before posting, but don’t remove the context.