Windows Defender will not allow me to install


I have downloaded client multiple times and get this message, I am not allowed to continue. Anyone know what's happening?-

If you click on more info you should get a new button to ignore this warning

"Nerds have a really complicated relationship with change: Change is awesome when WE'RE the ones doing it. As soon as change is coming from outside of us it becomes untrustworthy and it threatens what we think of is the familiar."
ā€“ Benno Rice