Make sure Win10 is fully updated, specifically the June 2017 Monthly roll up which addressed Carrizo APU's.
I have this same problem with the same APU. It's as if updating to 17.7.2 drivers reverted the fixes for the issues that were fixed with the first Crimson ReLive update.
I have a fully updated Windows 10 (Creators Update and all latest patches). To install this driver update I first uninstalled the previous driver, then rebooted into safe mode and used DDU, and after rebooting again installed the new drivers.
The specific driver package I installed was the one manually selected from the AMD website for this APU.
This does appear to be almost the same issue as we had before and had already gotten fixed. It seems to be just slightly milder than before now as the time in which the screen is frozen is less than a second (it used to be a full second).
I hope this can get fixed soon, and am available to do further testing on my laptop.
Update: I've noticed that the explorer process freezing issue disappears when I disable the R5 R330 graphic card.
So I guess it's a driver bug for that card, not the APU's.