How do I reset ALL network settings in Windows 7 Ultimate x64?

I have searched mulitple sites and forums for the last couple of days and have yet to find an answer to this seamingly simple task...How do I reset ALL network setting back to stock in Windows 7 Ultimate?

I have been having issues with my home network since upgrading my router (Cisco E-4200) and my operating system (from Home Premium to Ultimate with anytime upgrade).  Prior to this I had no difficulty in accessing my homegroup or my home network storage drive.  I know it is not the router because I have similar but different issues with another computer, here is the problem and why I want to just start all over fresh.

(Both laptops are running Windows 7 Ultimate, one is x64 and one is x32)

Laptop 1 (x-64) can access my home network in all its glory ONLY wirelessly...plug in the ethernet cable and I cant access laptop 2 or my network storage...Laptop 1 is also unable to join my homegroup even after deleting the old one and creating a new one.

Laptop 2 (x-32) can access my home network in most of its glory ONLY wired...unplug the ethernet cable and I cant access my network storage and it becomes unavailable to Laptop 1 over the network.  Laptop 2 is also not able to connect to Laptop 1 even though Laptop 1 can (sometimes) access files from Laptop 2's shared folders.

Also Laptop 2 cannot see a homegroup created by Laptop 1, but can create a homegroup that Laptop 1 can see but CAN'T join.

I have run all the trouble shooters that the system throws at me to no avail, they all say that I have an unknown network error that it cant fix.

So...how can I resolve this problem?

Thanks for the help, and if I have left out any crucial details, just ask and I will supply them to the best of my ability.

Edit: I do have internet access on both laptops regardless of wired or wireless, and I spent over 2 hours with Cisco tech support trying to ensure that it wasnt a problem on their end...boy, that was a treat...