A couple things. It is a mistake to consider going back to W7 - if you don't have to. W7 is already nearly 9 years old and mainstream support already ended 3 years ago in January 2015.
It is important to note that W10 is not XP or W7 and should not be treated the same way. There is no need to disable search/indexing or mess with other default settings. What you do need to do is let them run and finish, and just use the computer. Windows will then learn how you use the computer and optimize itself for you. Contrary to what many believe or want everyone else to believe, they are not smarter than the Windows development team at Microsoft. And Microsoft has not been sitting on their thumbs for the last 2 decades either. So if you are reading you need to do this or that to make W10 better, don't believe it.
Microsoft
developers really do know what they are doing (I emphasis "developers" because I can't necessarily say the same thing about some of the marketing and executive policy decisions that have come about
) and the default settings (many of which are dynamic for a good reason) really do work for the vast majority of users - if only those users would just leave them alone! Any by vast majority, I mean those of use sitting between 2 and 99% of all users.
As someone who is very much long-time, hands-on control freak myself when it comes to my computers, this idea of just letting Windows manage it can be a hard pill to swallow. But it does work.
You say you are frustrated after weeks non stop trying to accomplish a goal without success, but you didn't tell us what that goal is! And your screen shot looks great.
The only thing that really bothers me is the specifications for your
audio interface. It clearly says for driver support, "
Drivers: Windows 2000/XP/Vista/7/64". No Windows 8 or Windows 10! It is critical users understand it is the hardware manufacturer's responsibility to develop compatible W8/W10 drivers, not Microsoft's - if that hardware is expected to work properly with the latest operating systems. And it is the user's responsibility to ensure compatible drivers are available before trying to make the hardware work where it can't - or at least the user needs to be aware and accept that such "legacy" products may not be supported.
You should probably contact RME tech support and ask them about W10. Maybe they have a beta driver you can test for them. Otherwise, you may be forced to revert back the legacy W7 OS, or move to Linux, or do what RME most likely wants you to do and spend more money buying a new interface where they have developed current W10 drivers.