OK, Adrenaline 18.5.1 and Windows 10 April 2018 Update were no go for me.
They are just too buggy at this point.
I would recommend not to install either of them if you would like to run GGS.
forget about windows, linux did not have any of this "microsoft" problems
I ported excavator to Ubuntu at NiceHash, so I do know Linux has its own "Linux" problems.

I will consider a Linux port once I am done with automatic algorithm-switching.