Right click the start button and select programs and features. Then select Dell Dock and uninstall.

The DellDock was a Dell customised version of StarDock. The Windows 10 version is ObjectDock but is a paid program. You can however install the free trial of it to evaluate it:

http://www.stardock.com/products/objectdock/

I've been using the old Dell Dock for years and am using it now on my Windows 11 Inspiron. When I first put it on this computer the Dell dock was larger than it is now. Now it's only about 3/4" high and the icons are tiny. I can't find any way to change the size of the Dell dock. I don't want to change the size of anything else...text, icons on the screen, etc. I just want to resize the Dell Dock to make it larger. I already uninstalled/reinstalled it but that didn't change the size. It's too small. I don't want to use RocketDock or ObjectDock (especially if I have to pay for either one).