@u_f_o: You should copy symsrv.dll into the x64_dbg directory and then set the environent variable like this:
Code:
SET _NT_SYMBOL_PATH = symsrv*symsrv.dll*c:\*http://msdl.microsoft.com/download/symbols
Not recommended to use to globally, maybe a .bat file:
Code:
@echo off
SET _NT_SYMBOL_PATH = symsrv*symsrv.dll*c:\symbols*http://msdl.microsoft.com/download/symbols
start x64_dbg.exe "%1"
Greetings