This update requires you to disable "Cloud-delivered protection" and "Real-time protection" in windows defender temporarily.

Also, when you turn it back on after the update completes and you restart your computer, your merchant services credit card portal ceases to work, returning an error 500 internal server error. Turning "Cloud-delivered protection" in windows defender back off allows merchant services card processing to work again. Something for the Intuit Developers to take a look at, as it's not great to have to cripple your antivirus to run credit cards!