AutoCAD 2010/2011/2012 DWG Format

[#1]

When I try to use the array function, I get a "AcArrayRes.dll not found" message.  Both AcArrayRes.dll and .arx are in the main AutoCAD folder.  Can I download new, Un-corrupted versions of these files?  Other fixes?

[#2]

When you first launched the program after initial installation, were you an Administrator?  All software has some files to "tidy" up that it does when the program launches for the first time.  If you are not an administrator, those files may not be granted full permissions and/or get registered.  You may need to do a clean re-install, disable the UAC controls if you have Windows 7, and reinstall and run as an administrator the first time you launch the program.