One of my computers is in my home office, which is on ground level behind the garage. The router and DSL modem are on the floor above. The router is a Netgear Wi-Fi G. The card in the computer is a Belkin Wi-Fi G. For 2 months all worked fine, getting 36-54MB at all time. Suddenly it went down to 5.5MB and while I'm able to connect to a messenger of some type, surfing the net is impossible. Any suggestions/ideas ?