Windows 10: How do I keep a high framerate when program is minimized?

I do VTubing on Twitch where I have an instance of unity running in the background while streaming. I recently discovered that many exe programs reduce framerate when they are minimized causing a slight choppiness which ruins playback on obs. Is there a windows 10 registry setting that can uncap the framerate or disable the stutter when a visual program is minimised?

:)

 

How to actually start program minimized in Windows 10?

Steps i tried to make program (for example: Thunderbird) to load on startup, but minimized:

1. Placed shortcut under: C:\Users\Username\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup
   
2. In a shortcut properties i've checked "minimized"
   

Rebooted windows, it does start, but MAXIMIZED! Can't make it minimized, just like on MacOS i could set it hidden.

 

Auto-minimizing of some programs, not able to bring out of minimized state

I have been have some strange issues for a while now, in that certain programs are unwilling to open in any state other than minimized. It started with Steam, not the whole program but messages from a single friend always remaining minimized. It has now
progressed to the friends list always remaining minimized as well as several other friends' messages being sometimes minimized. This morning it started happening to every Chrome page I tried to open. The page opens in minimized form and cannot be pulled up
on the screen in any way. This happens regardless of what other programs are open or how many times the program is opened. I have tried re-installing Chrome and restoring the computer to about a week ago. As this is no longer confined to a single program I
am convinced that there is a setting somewhere in Windows 10 that is causing this despite the fact that I have not been altering any settings. I have been using Windows 10 for months without significant problems, but this is getting ridiculous. Any suggests
for resolving this would be much appreciated.

 

Why did the startup window get cleared?

I didn't missed any step, the list was gone and gone , even after using lot of programs the programs were not listed in that list.