Downgrade Windows without losing data?

[finplayer21]

Hey :3

I'm currently running Win 10, and i find it really annoying that i can't play any older games (DX9) like css, bo2, flight sim or gta iv, they just crash on launch. I believe that's because of DX12, at least all the problems started when it was added to Win 10. Games that run DX11 are very unstable like csgo, it crashes if i alt+tab while in a match or my whole computer crashes (become's unresponsive, can't click anything) sometimes when i alt+tab while in the menus...

 

If it possible to downgrade your Windows without losing any data? Like install Win 7 on another partition, move the windows 7 folder to my current drive (Win 10) on OS X and just copy the regs from Win 10 to Win 7.

 

Or if anyone knows how to disable DX12 or something that would be awesome :3

Thanks

[Arty]

WHEN YOU downgrade/upgrade windows it puts all windows files in a windows.old folder FOR you