It has nothing to do with color, or night light, or blue light. The issue is with dwm.exe, the Windows Desktop Manager. It's what controls the windows display. DWM was changed in Windows 8 and again...

I tried that, it just "reset" the checkbox being on, I them followed the steps for both methods and got the same result.

Yes I did. The icon label still have a drop shadow present. I verified that the checkbox in Advanced System Settings was still unchecked and the registry setting was set to disable the drop shadow,...

I tried Advanced system settings > Performance > Unchecked everything and they went away for about 10 seconds and the reappeared. After that Windows completely ignores the setting.

I tried editing...