Not working on setup progress

hello everyone i have a problem with zerotier
when i download zerotier setup and started it
it takes almos two hour and a uncomplated downloading phase if i click on anything it just says “setup stopped working” and when i try to close it i need me get into the task manager and press end progress on multiple zerotier setups and windows downloaders what can i do with it i am currently using windows 8.1 pro activated and i am a lot angry i almost lose 1 day on this program so please help me with my problem