I have the same problem with INSPIRON 7380, I think it is a general failure from Dell, because in other laptop INSPIRON 5570 the Check Drivers with support assist does not function. It would be nice if Dell try to fix it or say something regarding this issue.
Hi Dell team. So, I had some issues with Support Assist in my Dell laptop 2-in-1 that lasted for several weeks, just circling without getting access or getting updates. Additionally, I noticed that my Support Assist reported the wrong service tag code, not the one on the back of my laptop. I also followed these instructions:  Delete these following directories if they exist.  C:\ProgramData\PCDr C:\ProgramData\SupportAssist C:\Program Files\Dell\DellDataVault (if unable to delete, reboot and try) C:\Program Files\Dell\SupportAssistAgent  And I followed everything regarding clean uninstalling from the control panel.  And that was it; after that, I couldn't install SA ever again.  I tried both installers; (SupportAssistInstaller.exe) and (SupportAssistLauncher.exe), it didn't work either.  Below is the only response that I keep receiving with every attempt to install SA.  [IMAGE]       I'd appreciate any help, please. 
Dell SupportAssist not installing after uninstalling