[Windows] Game does not start with “Couldn’t start ….. Create Process returned …” message

Avast antivirus, or Emsisoft is known to cause this issue. If you have this issue and you have Avast running, open it, go to Settings > General > scroll down until you see Exclusions > then add your UT folder there. For Emsisoft, scroll to the Quarantine files, select the EPICA.exe file and restore it.