The Infrastructure Manager application keeps crashing constantly. I couldn't see any event logs in the event viewer for this crash.
From the http://<primary_hub_hostname>/uimhome page, download the appropriate version of the Infrastructure Manager (NimBUS Manager.exe) for the DX UIM version and CU you currently have installed.
Rt-click to "Run as administrator" to upgrade/reinstall it.
Check the IM and/or Windows events again to ensure there are no crashes.