Hi [NAME], Uninstall existing SupportAssist via the Control Panel Then 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 (if unable to delete, reboot and try)   Post this, reboot the PC and try reinstalling SupportAssist. 
SupportAssist on my Inspiron 3585 reports a Service Tag Code which is different from that shown on the label or by the BIOS.  I think this might explain some strange behaviour - SupportAssist often tells me of driver updates which don't need updating.  This may be because the laptop had been replaced soon after I bought it and the shop swapped the old SSD to the new machine. Can I fix this?  I can't find either Service Tag Code in the registry. Peter M
SupportAssist reports wrong Service Tag Code