Problems such as yours are sometimes caused by files that should belong to you but are locked or have a wrong owner. This procedure will check for such files. It makes no changes and therefore 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 — all of the next line into the Terminal window, then press return:
find . $TMPDIR.. -flags +sappnd,schg,uappnd,uchg -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.