The latest preview version to date is so security conscious, that with a lot of software you have to go through a procedure to allow it to 'run on this device' and some software especially for overclockers require VBS to be enabled in Windows (registry edit) So I think with the 2019 Spring release a lot of punters are going to be surprised and puzzled 👨🏻
They could make it even more security conscious by letting it not boot at all. This will probably happen.
No problems with either the drivers or the cumulative. Build 17763.437 for those playing along at home. WU still foists updates on me without asking. No problems on me sister's laptop either, it just took longer.