I setup bootcamp on my new iMac core i7 with 8gb memory and a 1TB Fusion drive. Win 10 works on this setup but it is unbelievably slow. I used the latest win 10 from Microsoft and applied all the updates. It can take up to 30 seconds to load Chrome and much longer to load large applications. 2 minutes and 12 seconds to load Visual Studio 2017 community edition. The bootcamp partition has more than 100GB remaining. Any ideas on why such capable HW runs windows so slowly?