Maybe Windows updated the drivers. Remove all the GPU drivers in safe mode using DDU and make sure to enable the option in DDU to disable the Windows automatic driver install. If you want to mine Ethash coins like Ethereum on Windows 10 v1709 (Fall Creators Update) with AMD cards, you need to use the latest Crimson Relive 17.1x.x drivers and toggle to the 'compute' mode from 'gaming' for each card in AMD settings.
With RX 470/480 or RX 570 cards, you will then need to use the pixel patcher to bypass the driver signature check with a modded Bios to remove the Code 43 error in Device Manager before the cards will work. Just run the patcher, reboot and verify all the cards are shown in Device Manager with no errors.
https://www.monitortests.com/forum/Thread-AMD-ATI-Pixel-Clock-PatcherIn the Windows 10 Pro Group Policy Editor you can keep Windows Update from updating the the drivers on it's own.
gpedit ==> Computer Configuration ==> Administrative Templates ==> Windows Components ==> Windows Update and set 'Do not include drivers with Windows Update' to enabled.