Users may occasionally experience an issue where the Smart Screen feature in Windows advises the users that the wtfast installer may be a risk, and causing a false positive alert.
Which is a good thing, its always better to be safe then sorry!
We don't advise disabling smart screen in the control panel, but you can still install wtfast with a few simple steps.
1. When SmartScreen appears it usually says the app you want to install is unrecognized. The filter then leaves you with only one button to push:
2. Click on the more info button to have smart screen show you the advanced options.
3. Click run anyway and it will allow you to install wtfast without you needing to disable smart screen.