After reinstalling Win10, I ended up optimizing it by following carefully this 'ultimate" guide.
I compared the results in terms of performances with those noted before and found that the cpu usage or loading times were about the same.
I specify that my windows system was already optimized for several years and that my biggest gig contains less than 20 rackspaces and the rackspaces are not very loaded in number of plugins.
Indeed, I only play compositions and I’m alone live to accompany spoken word performances. My work is based on the only guitar playing with audio plugins plus some synths via Midi Guitar from JamOrigin, the use of loops as well as audio files of “sound material” manipulated in the audio player.
On the other hand, it may be subjective, but I have the impression that there is more stability overall, especially in other applications than GP, which would mean that GP is basically very stable.
In any case, I’ve learned a lot about component settings, the use of windows services, priorities and so on.
This guide is really very complete and very accessible even for people with little computer skills.
I regularly recommend it on other forums and to my friends and family.
Thank you again @Npudar for this remarkable work which deserves to be called “ultimate”.