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.
- Select the option "Choose from a list of all Dell products" --> Click on "Continue" --> Click on "Laptops" *Choose your laptop model.
- Now download all the drivers and install them.
Some devices may not work properly if the drivers are installed outdated. For more information click on the below link.
- So install the "Chipset" drivers first.
Thanks to jack4rall for this tip.