The Windows update is official out and it doesn't bring huge changes from the previous version, so your old Radeon driver might still work. However with the Radeon Software 18.4.1, AMD improves performance once again.
Along with support for the latest version of Windows 10, AMD has fixed some bugs as well. For example the water should now render properly in World of Final Fantasy. Furthermore, Radeon RX 400-series graphics cards should be able to run Call of Duty: WWII without graphical corruption now. Last but not least, Sea of Thieves is now compatible with Crossfire setups.
At the moment there are several known issues with this release. Rise of the Tomb Raider might hang in DX12 and World of Tanks might suffer texture corruption. In addition, the Witcher 3 might stutter during gameplay.
As always, you can download the latest AMD Radeon Software Adrenalin Edition drivers over at AMD's support page.
Source:
AMD