It's not that I don't trust it because I have used it for quite a while now. There isn't any way to continue. There is no means to continue with the install.
I think this problem arises from the fact that yosetup.exe was not signed by a digital signature.
So Windows Defender does not trust it.
I have uploaded signed build, please try to download YoWindow again.
Let us know if you can install YoWindow this time.
Get YoWindow weather app for your phone or tablet.
I am having the same problem. (running windows 7 64 bit). I bought the registerd version of the program. The program was running fine until I got the black sky and could not get rid of it. tried to uninstall then reinstall but now I get the 'program unsafe' message and can't get past that. Tried to download from the YoWindow site (also tried CNET) but still get 'program unsafe.'