After doing a system reset on my computer, the wireless option has been turned off. The wireless card is not under Network adapters anymore. I honestly don't know what to do. It's a Dell Latitude D520. The wireless card is a Dell Wireless 1395 WLAN mini card.
~1394 Net Adapter
No devices under Network Adapters have a red x.
I've tried resetting the TCI/IP, and the winsock.
You need to install all the drivers. The yellow exclamation mark indicates that drivers are not installed properly. You can download the drivers from the manufacture's website.
Click on the below link and follow the instructions