I am trying to register a COM DLL using Inno Setup in a setup package I created. During test installations on Vista, I get this error: Unable to register the DLL/OCX: RegSvr32 failed with exit code 0xC0000005 I click "Ignore" and my application appears to install, but I have to then open a command prompt (as an administrator) and then regsvr32 to install the COM DLL. Is there any way to do this automatically in Inno Setup?