Norton freezes while creating restore point

As it has for years, Norton Utilities does an automatic scan just about every day.  It always says it found something, so I say "repair" and it does its' thing.  While doing so, a dialog box says "Creating Restore Point".  Once it finishes, I close the window and go about my business.  Now, for the past 3 or 4 days, when it gets to "Creating Restore Point", it gets about half done and then freezes.  I can't close the window or the program.  I have to go to Task Manager to shut it down.  Any thoughts about why this is happening?