6 to 4 Adapter - Please Explain

I use Vista Home Premium on a Dell PC XPS 420. In Device Manger my 6 to 4
adapter had a yellow caution symbol next to it. The Dell tech told me I did
not need that adapter and disabled it. Recently I have had network adapter
issues in that when my computer comes out of the Sleep mode, it takes maybe 3
to 4 minutes to get an I.E. connection. So, I thought I might try to enable
the 6 to 4 adapter to see if that would help my problem. When I did that I
got a message saying “Windows cannot load the drivers. Code 31”
1. What is the purpose of the 6 to 4 adapter?
2. Do I need to have it working?
3. If so, how can I get the drivers?
4. Do you think the 6 to 4 adapter could be causing my I. E. problem?

Is that adaptor by Dell? If so, you should probably try to obtain updated drivers from them. You really need to be dealing directly with Dell support on this anyway since it's their machine. Also, Dell maintains excellent user forums. I suggest you try to get an answer there.

Dell user forums: Link

Regards.