If its a USB device i would bin it they use about 80% of your CPU power and this is not good, get a Wired Router i'm not into Wireless, the Netgear DG834 is very good for the price.
Double Firewall using Stateful Packet Inspection (SPI) and Intrusion Control features Denial of Service protection from hacker attacks, while VPN (Virtual Private Network) pass-through permits secure access to your office or corporate network.
Link for more info.
Netgear
Jim