Yesterday, Windows 10 installed the latest driver update 18.8.2 for my Radeon RX 540 on my HP Elitebook 850.
The consequence was that some programs started up with a blank screen. The programs did work (in fact, clicking on areas where a button supposed to be, caused a reaction) but everything in these programs was white.
Programs affected: SSMS (SQLServer Management Studio), Windows Power Shell ISE, ServiceTierAdministration.
However most programs still worked fine. Namely Excel, Word, Outlook, Firefox, Edge.
I tried to downgrad to driver version 18.5.1 but that didn't solve the problem.
Solution: In Device Manager I disabled Display Adapter "Radeon 500 Series". Using the default Intel(R) UHD Graphics 620 instead.
(Wondering, why my Laptop has two Display adapters in first place).
As I use my Laptop for work and not for gaming, the solution with the deactivated Radeon works for me.
Nevertheless I wanted to bring this bug to the attention of AMD to help you avoid a bunch of frustrated gamers out there :-)