The problem is that certain OLE system files are in use by some program running on your system and the installation program can't replace the file while it is being used. You need to close all running applications before running a setup program. In some rare cases, this may involve closing programs running in your system tray (right end of the taskbar), as well as those that appear on the main part of the taskbar. Also, if you have Microsoft Office the Office Fast-Start in the Startup folder may be using these OLE files.
If you are having trouble determining what programs are running, you can get a list by press Control-Alt-Delete ONCE (twice will reboot the system).