1. If you don't mind to spend $10, then you can buy Edimax EW-7811Un USB wifi adapter. It is very small wifi adapter. You can google it using "Edimax EW-7811Un price" keywords. 2.222. Look for the exact driver of the Yellow exclamation mark device:
On the Device Manager, click the Yellow exclamation marked device.
On the "Details" tab:
- Click the Property bar arrow and chose "Hardware Ids",
- In the "Value" info box, you will see some info, for example "USB\VID_7392&PID_7811"
- Google the driver using keywords: "Dell + that info" (Dell USB\VID_7392&PID_7811);
- Note: You don't need to include any detail info after the "PID" info.
- Other alternative: Post that info on Fixya, so other user can help you to find the safe source (in this case, in Dell website).
Please notice that some websites contain a lot of malware and they ask you or trick you to download and install small application that may contain a questionable function (bad software; avoid it).
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