1 possible solution... if you have the space & resources for doing so... would be to set up in your Win 11 tower, a setup of HD's that can be then used to house either Win 10, 7 or even back it down to XP... if there are still valid resources around to take it back, even that far...
![Hmmm](images/smilies/39.gif)
that are safe to insource from.
Either that, or if your primary HD is big enough... have it house 11 & 1 of those other pre-11 op sys's on it... use the older op sys to run the older games on & thereby utilizing the Win 11, for more... modern stuff... & or games.
That, or just find a tower that already has Win 10 or older op sys already installed & shift your older games over to that...
Hope this helps...
M. M.