Solved A Problem With My Linksys Router.

For several months now, Windows won't install updates, programs won't register online, and now Windows won't register, saying "there is no modem insatlled". Yet magically, all lights are flashing and I can surf the web. I highly suspect the issue is with my modem. Linksys tells me it's a Windows issue and MS tells me it's a router issue. So here I am asking Windows users at large. What oin...