Before downloading this I had Windows 10 delete my existing Lightroom CC files. Then I downloaded from Creative Cloud App Manager. When I tried to open it from CC App Manager my CPU fan spun up but nothing happened on screen no error messages that I could see. This is exactly the behavior I had before deleting the app and doing a new download. It seems that I remember reading a forum post regarding this problem and there was some setting to get Lightroom to switch from version 5.7 to version CC.
Do you have 32bit or 64bit version of Windows 10?
Does it run from the shortcut from Start / All Apps / Adobe Lightroom? Mine actually won’t run from the CC Desktop app Open button, either. I have to use the shortcut which I’ve pinned to my task bar.