User Feedback:
“After updating to the latest Windows 10 version, my KT200 II suddenly won’t start. I’m wondering if anyone else has experienced this issue? ”
How to Fix KT200-II Not Starting After Windows 10 Update-03

Possible Reason and Solution:
One user shared their experience and fix:
“I had the same issue..
After updating Windows, it reactivated all.
Had to turn it off again and reinstall software ..
All working fine after it
In my case was firewall settings issue..
But if u have it turn it off already, try to delete all kt folders and reinstall soft..
Server is runing fine, I used tool about 2h ago.
So it should be an issue with your installation”

Finally, After reinitialization of laptop it’s done , KT200II soft work, thanks at all.