With Dell's help, they disabled the System Repair option in the Dell Support Assist app, the Dell Data Manager usage went back to less than 5% and the CPU usage is now back to normal.
My Windows 10 Inspiron laptop is running very slow.  When viewing Task Manager I noticed that Dell Data Manager is using ~70% CPU consistently.  What is this service and can it be disabled without affecting the system's operation and/or performance?
Dell Data Manager High CPU Usage