There are various optimisers out there such as
Audiophile Optimizer,
Fidelizer and
CAD. Those are just some examples, many more.
Essentially the aim is get to a point where there is minimal hardware and minimal software running.
So in my case I have a dedicated headless PC with no spinning discs (hard or cd), no fans and with as many options at the BIOS level turned off. And then at the operating system level turn off all services that are not required. I use Win10 pro so I use the 'Services' app to turn things off. But for a quick and dirty way of doing things I run
Privacy Repairer which in addition to protecting your privacy also stops loads of background services. Another quick and dirty method is to uninstall loads of unnecessary apps and programs that come as standard with Windows. Use uninstall within ccleaner as the uninstall app within Windows does not allow deletion of some stuff (e.g. xbox). All this gets you 90% of the way.
One of the biggest sonic improvements I experienced was to have music stored on another machine and connected via ethernet. Thus the music rendering machine was freed up from spinning discs, library management and so forth. Another boost was implementing Roon in this server/client model as Roon does all its processing at the Server level so the transport layer to the end point and to the DAC is optimised.
I built a machine some time ago for a friend using Linux which worked well. I may try that again using some of the latest tricks being mentioned.
anyway just some thoughts. as usual ymmv.