Hello, I have a Dell Inspiron 1501 Laptop with Windows Vista Home three years ago. It came with a wireless card installed when I bought it three years ago. I never had problems until the other day when multiple viruses and worms were detected. I took it to a local computer repair shop. He kept it for several more days than I had expected. The repair technician said viruses were still present in many of the files after repeated maintenance. I instructed the technician to remove all files in order to speed up the repair process since viruses and worms were still present. Now I can only access Internet with cable plugged into router only. I went on Dell and Microsoft sites and attempted to reinstall the wireless card and thought I was successful. But it istill not enabling me to unplug the cable and move my laptop to other rooms in the apartment.
It could be the wireless security passphrase needs to be added to the laptop.
Connect the computer to the router with an ethernet cable.
See the literature which came with your router for how to access the user setup screens in the router. Once in go to wireless security and review or renew the wireless security type and password. WPA PSK TKIP is the most common security type in use. Make a note of the SSID or change it to one of your invention.
Go to wireless mode and ensure that it's set to a protocol matching your computer's wireless adapter (mixed mode is a safe bet). Check for a setting often called Access List that includes or excludes users by identifying the MAC ID unique to their wireless adapter. Disable that.
Disconnect ethernet cable.
Go to the computer's wireless networking setup screen and see if you can detect the router's SSID (wireless call sign). Select that network.
Apply the wireless security type and password to the computer's wireless networking setup screen.