AutoCAD Family: setup.exe - Bad Image - pdh.dll is either not designed to run on Windows or contains an error

Recently, we had a customer trying to install AutoCAD 2012 on Windows 7 x64 and there was an error with the following pdh.dll:

setup.exe - Bad Image - pdh.dll is either not designed to run on Windows or contains an error.

The error message mentions to update pdh.dll file in:

C:\Windows\system32\pdh.dll

You can try to copy a working pdh.dll file from another Windows 7 x64 workstation and copy it to the problematic computer but the error will still occur.

Using Procmon, we were able to find out that the pdh.dll file is also in another location!   From a system that is currently working, you will need to copy the pdh.dll to a USB drive or a network location in this location as well.

C:\Windows\SysWOW64\pdh.dll

Reference posts:

http://upandready.typepad.com/up_and_ready/2011/10/general-systems-the-basics-of-using-process-monitor.html

http://upandready.typepad.com/up_and_ready/2011/11/autocad-2012-lt-setupuidll-is-not-designed-to-run-on-windows-or-it-contains-an-error.html

Thanks to Jamie Monteith for confirming that this solution worked!