I found my answer here: [URL]#Reinstall When you upgrade to Windows 10 you must delete the old Dell Support Center and reinstall the new Dell SupportAssist program at the above website.
Under Product Support I try to run Diagnostics. It hangs up at Checking for SupportAssist and shows an error message: "There was a problem with your internet connection. Please try running the diagnostic again". I don't understand this because I'm on the internet at the time. Any ideas? Thanks Windows 10 Internet Explorer (Also tried Firefox) Dell Inspiron 660, i3 -3240 CPU @ 3.40GHZ  Memory 8GB  
Diagnostics will not run.