Rocksmith 2014 Remastered *still* not working.. Anything else left to try?

As title, I still cannot get Rocksmith to run, it simply won't even load up from Steam.

I am using my Lenovo Legion 9i Gen9 Laptop now as I sold my main system, which was about 15 years old now!

I have been away a while and it used to run perfectly, with and without custom cdlc.

I have spent the last week finding and applying every fix I have found here and on google, done everything in all the videos, disabled blutooth, audio drivers, changed screen resolution, cleared caches, rolled back to previous version, disabled cpu cores as I think this thing has 24, and pretty much everything you can find that comes up in googling.

I will add, that I haven't installed any of the cdlc nor set Rocksmith up for it, I simply done a fresh install of Rocksmith, and it just wont load, not even the previous version that we can unlock with the code. So all I am trying to do right now is get the base, vanilla, game to run.

I have a load of official DLC bought in the steam sales, so just getting the vanilla game to run with that would be nice to start with at least.

I noticed in a recent post that a win 11 security update caused issues too, though I took that off and still nothing.

I am at a complete loss as to how on earth I'm meant to get this to run, is there any more ideas and advice just so that we can play?