Mine started freezing on launch. Went to C:\Program Files\Dell\SupportAssistAgent\bin\Resources\New-Dell-Logo-White-Small.png and deleted -Small. Should look like New-Dell-Logo-White.png.  Working now.
support assist not responding on my dell 2-1 inspiron 15-5578 running windows 10 version 1803. any one got the instructions for fixing this issue.
support assist