afaik you can just download Win 10 Installation Media and provide a Win7/8/8.1 key after installation, chances are this is still working and will upgrade your key to Win10. Highly recommended for everyone using Win8 (because that was crap)
anyway, I doubt this will solve your issue, and it may make your laptop significantly slower than you are used to (depending on specs)
There is another thing I’ve found in the MonoGame/Game.cs when using FixedTimeStep, there is a sleep, when the TargetElapsedTime is bigger the elapsedtime. Maybe that causes issues, when the difference is just fractional and the sleep call itself takes longer than it should actually sleep (it’s also requerying NTTimeResolution everytime, I don’t think this is changing during a session).
That sleep is ommited with DESKTOPGL - so maybe this is an easy way of trying it by making a DESKTOPGL project and see if the stutter is there