I upgraded my one-year old Dell Inspiron 7537 laptop from Windows 8.1 to Windows 10.  All went very well.  Win10 is a nice improvement and all of my apps, programs, and drivers run fine.  The only downside - Win10 boots slower than my Win8.1 installation, probably about 50% slower.  I have the absolute minimum number of apps/programs loading at startup.  Would a clean install of Win10 help this issue?