Tutorial was uploaded onto youtube by MrAmayosken.
Explorer patcher, OpenShell, registry hacks and that was in only a few minutes! I won't spend an hour watching some dude hack Windows 11 to pieces to make it look like Windows 7. That is not what this forum is for, and that is the reason for me asking for all the information above to determine if there is issues with Stardock software or something else.
The video starts with this and there is a reason for it and should ring a bell:

The only way I know of that can remove all hacks & patches like that and get Windows back to factory standard, is to install a fresh copy of Windows 11, or you could try these steps as a last resort.
Follow this tutorial to restore missing or corrupted system files (including system icons) :
System File CheckerSet the scaling of your screen to 100% and apply the theme.
I'm sorry you have encountered issues with your operating system, but Windowblinds has nothing to do with it.