Hi Ztrucker,
First, thank you for the help! Your advice is a little off target because I misled you with "Hi, I have a program installed..."
Actually, I wrote the program and the installer, and my goal is to fix the installer so that the installed program is able to rename some files. This file renaming hasn't been a problem until encountering one particular Windows 7 64 machine (see OP.)
Any guesses as to why this particular Windows 7 machine is being so picky? What should I have the installer do so that the application will be able to copy/rename its own files?
NOTE: During installation, the installer runs a .bat file which copies device drivers and DLLs to various folders inder C:\Windows. This same .bat could configure the installation directory - or, better, just the \Drivers sub-directory - so that the program will be able to rename some files.
Thanks/Cheers!