Hi Dominique,

The installation of ApUtils.DLL has not changed in a long time, so that implies something local to your computer is causing it. In particular, the error message indicates there was an access error. The installer should elevate itself to administrator privileges, but you might try right-clicking the installer and selecting "Run as administrator".

If the access error persists that could mean that the DLL is in use or locked by your Anti-Virus program. So, make sure to shut down APCC completely and try temporarily shutting off your AV program during installation.

-Ray