Navigating networked folders freezes

Archived from groups: microsoft.public.broadbandnet.hardware (More info?)

I'm using an MN-700 Router to network one desktop
computer (connected via ethernet cable) and one laptop
(connected by wireless card). Recently I had to reformat
both my hard-drives on the desktop and laptop for
different reasons and since then I have not been able to
reestablish a perfectly functioning network like I had
before. While each computer can see the other and
recognise the shared folders, I cannot seem to access
some of those folders. But of greater annoyance is the
fact that as I navigate through the folders with
explorer, if I try to use the back arrow or up arrow to
return to the previous level the network freezes and
won't work again until I do the three finger programme
terminator. The same happens if I am in My Network Places
and try to do a refresh.

Obviously something isn't set up just right but I cannot
figure out what and nothing in the documentation or on
this site is of any help. Any ideas out there?