the router should NOT show up in Device Manager; the box's network adapter
should show up, but not the router itself. if you can call up the
router's config page w/ your browser (usually
http://192.168.0.1) then you
are gettting thru to it.
One way to straighten out these issues fairly easily is to run the Network
Setup Wizzard (in Control Panel). It will ensure that all neccessary
services are running and that all basic settings are made. Note it
usually turns on more things than are actually needed, but it's a good
starting point.