Re: Cannot find wireless networks.
I appreciate your researching and finding the fix for the problem. However, before trying advanced troubleshooting such as checking the Services in Windows try some basic troubleshooting steps suggested below:
1. Run “Windows 7 Network Troubleshooter”. To start “Windows 7 Network Troubleshooter” right-click the network icon in the notification area of your taskbar, and then click Troubleshoot problems (see the image below).
2. Check if Wireless Radio switch is on. Use the F2 key to turn wireless switch On.
3. Check the wireless card in Device Manager. If not detected Load BIOS defaults and re-seat the wireless card. To load BIOS defaults, start the BIOS Setup by hitting the F2 key when Dell Logo appears on start-up and then hit the F9 key, save and exit. You can find steps on how to re-seat he wireless card in the Service Manual. You can view/download the service manual from here.
Do reply with results.