People hopefully know that you can throw out certificates you don't like/need/want (if you have admin access).
As admin or 'rub as admin', open the start menu or Alt-R. Then, in the 'Run' window type: mmc
You will get a new window that allows you to create a link to certain administrative part you would like to have easy access to.
In that window you can select the certificate manager.
Select that and enable access to System and User sections of the cert manager.
After that another window will open showing you all the certificate stores from both the user account and system itself. A root certificate is usually found in the 'root certificate' store and/or 'intermediate root certificate' store. Once found, it is simply select and delete. This has immediate effect, but if you feel better doing a reboot.
However, in general you should be wary removing any type of certificate, as they can have serious consequences for your general computing experience.
But if by any chance you lose the ability to use (some) software that came with your Dell customer PC, don't fret and look for alternatives. You'll be better off in the long run anyway. For Dell servers it is more problematic. Then again, professionals use those and they already know the above and should be able to work around this problem anyway (in case they depend on (some) Dell software to run the server).
I must add that I like/setup my Windows and Linux servers to be as "bare" as possible (regarding software). Heck, I don't mind removing case plates on all sides if I think that serves me better. Now I do understand that this mindset belongs to a tiny minority that wants function over form. And I am proud to belong
(hence you won't ever see me own any Apple device that puts form over function)