Hold the power key till it shuts down, it may take a little while, try holding it thru the warning.
Then if it shuts down restart and open Safari/Preferences, General tab, and set "Save Downloaded Files to:"
Select desktop, if desktop is not available in the the drop down menu, click other, then select Desktop from the column from the on the left.
Then download this:
This will download the "stand alone installer"
Click on the installer pkg and follow the prompts.
Hope this helps
Thanks for your prompt reply. I was getting an error tone when I tried to shut down computer, however, later, I again pushed the shut down button. No tone warning, and it accepted a hard shut down request. I was then able to start computer, and all is well now. Thanks for your support.
I was trying to set up a Genius Bar appointment at the Del Monte store, and was told that there were not any appointments available until Monday night!! Not acceptable on Friday night when you need your computer every day! More store staffing, please!