A family of Microsoft presentation graphics products that offer tools for creating presentations and adding graphic effects like multimedia objects and special effects with text.
Hi
Because you are having problems across many storage venues, it would seem that the problem is with your file system. Run a robust disk maintenance utility. Use it to verify the startup volume and all attached volumes. Before doing any additional troubleshooting, make sure the file system is OK.
If the problem persists, there could be a problem with your Mac OS user account. Go to System Preferences > Accounts. Make a new user account and boot to that account. Test in the new account. Any change?