Hi hhal - yes that new error is likely related to privileges - there is a Windows security mechanism that by default prevents files under c:\Program Files from being modified.

Please try starting Winzip in this alternate method - right-click it and then choose "Run as administrator". That should launch a session of it with elevated privileges that will allow it to write to c:\Program Files, so hopefully if you do the same thing as before it should work. But please note that you want to change "Overlay Files" to yes because you do want one file to get overwrittten.

Another alternate way is you can unzip it somewhere else like to your desktop and then use the Windows Explorer to copy the files over, Explorer will ask if you want to allow it and then say yes there and tell it to replace the one file that it will ask you about.

Hope this helps,

- Michael