12.6.5 CR2 now has a JCS that allows you to adjust timeout value:
Open command prompt (as administrator) and set the environment variable JCS_SERVICE_TIMEOUT to say 600 seconds
Command:
On Windows: SET JCS_SERVICE_TIMEOUT=600
On Linux/Solaris: Export JCS_SERVICE_TIMEOUT=600
Then run the installer from the same command prompt, setup.exe.
<installer_program>
The installer will now use the timeout value that you declare. This has been done due to some customers experiencing a timeout issue when installing the JCS Component of IDM at the 5 minute marker. When troubleshooting first attempt to set the JCS time out to 600 seconds or 10 minutes. Should the installer still fail please open a support case for assistance and troubleshooting.