Ok!

Should I download DDU from here http://www.guru3d.com/files-details/display-driver-uninstaller-download.html (is this the official link)? The DDU says that it is compatible with up to Windows 10 Creator update 1703 (anything higher is at your own risk). I have 1709 version. Will there be a problem by using it with my version of Windows? (I have the AMD Cleanup Utility too. Does this app do the same thing?)

Also, how to enter safe mode in Windows 10?

Thank you very much Vann! Thank you also karim_hassan777. Yes, I have the Pro version of Windows 10

I have a question. When I will make a format and a clean installation of Windows 10 1709 then should I make the settings you provide from the first moment of Windows Logon? Or should I do all the updates of 1709 first and when the next update is the 1803 version to set "pause" to the updates and then to go to gpedit and make the changes?

Hi. I had set up a mining rig which worked good for about a year mining Ethereum and Ethereum Classic using Claymore miner v11.5.

My mining rig composed of:

ASRock H110 PRO BTC+ motherboard,
2 x 4GB (8GB) HyperX HX424C15FBK2/8 DDR4 2400MHz RAM,
Intel Core i7-7700K CPU,
Kingston SUV400S37/120G UV400 120GB SSD,
8 x Sapphire Pulse Radeon RX580 8GB VGA cards,
2 x Corsair HX1000 PSUs.

Everything worked fine with all of my 8 x RX580 cards and Windows 10 1709 64bit edition. But before about a month that the Windows 10 April 2018 Update (version 1803) being released, the system became problematic and extremely slow. It momentarily stalling (at load time in logon page of Windows and later inside Windows) and the mouse pointer became to stutter for all the time!! Also, the audio failed to start giving an "x" in the tray icon! Plus, the most important, Claymore miner (v11.5) it stalls in the beginning and never goes to the vga cards identification and later to the mining process

This situation happens if I have all the 8 cards connected. If I disconnect the 5 cards and only leave the 3 cards connected, then the system runs smoothly. If I connect one more card (4 cards total) then the system becomes to stall and to have the previously described behavior.

I made a clean format and installed Windows 10 1709 (64bit) edition with the latest vga drivers from AMD and everything worked fine (plus the sound) with all of my 8 x RX580 cards. But some days later the system auto updated to 1803!! And then became problematic again...

Does anyone have the same problem with ASRock H110 PRO BTC+ and AMD cards after 1803 update? Is there any conflict somewhere? I can't understand..

Thanks