I hear this is a common issue. Im deploying a unity project (one of the simple hololens tutuorials). All seems to go well but when doing a build in Visual studio 2017, it gives me the error : MSB3774 Could not find SDK "WindowsMobile, Version=10.0.16299.0" Now my SDK on my computer is installed, then did a repair, then did an uninstall and reinstall. Should be on there. I followed all of the steps that ive found to export it for a build. What next? Thanks guys!