WOW! I've tried everything on the internet until seeing this post and was just about to give up and do a clean install of Windows 10! So glad I didn't!
I recently built a Ryzen 9 7950X pc in mid Dec 2022. It was working fine for the first week or so. Then I noticed the integrated graphics GPU disappeared from my task manager. I ignored it because I really only use my rtx3090.
Around the same time the AMD integrated graphics disappeared from my task manager, I started running into the same issue of the ctrl+shift+s, ctrl+shift+c and ctrl+shift+e not working which are all hotkeys I use in Blender and Photoshop etc. I didn't even consider that the integrated graphics issue could be related to hotkeys.
WELP, I just found this post thankfully and installed the AMD Adrenalin Edition/Auto-Detect software... it detected an issue with my integrated graphics card. Restarted my machine and my AMD integrated graphics card now shows up in my task manager and the ctrl+shift+s, c, e problem is FIXED!
Why the integrated gpu is affecting certain hotkeys is beyond me.
For anyone with a new Ryzen 9 gen 4 chipset, here's the Software that fixed the issue for me:
Thanks for the posts people!