Hi everyone. Thank you all for your comments.  I apologise for not getting back before but I have been having a very supportive conversation with DELL-Cares which has now resolved this issue though not everything with SupportAssist.  I must also look at my notifications as I was not aware that you were posting here.  Sorry. The outcome is, I uninstalled SupportAssist downloaded the latest version [3.6.0.97] and re-installed.  This found two updates and successfully installed them both.   So problem solved.   Thanks for your time and thoughts.  I hope my solution, helps others.
Hi  I'm relatively new to this forum and the Dell SupportAssist software which so far seems a bit of a mixed blessing. My issue at the moment is that SupportAssist says I need an urgent update of the "SupportAssist OS Recovery Tools" which it has downloaded somewhere.  However every time I tell it to install, it fails.  I have tried rebooting and also tried turning off my AntiVirus software but same result - fail. I have also been getting a Hardware Scan message that the "USB Composite - Cannot Run" for a while.  Though I was not aware of any changes to the system when this first came up and I can find no issues with the USB side of the machine. Any advice would be greatly appreciated. Mike
SupportAssist OS Recovery Tools failing to install on XPS 15 7590