I suggest uninstalling the current driver and installing the latest one available on the Dell website.
Download the latest driver from the link below.
https://dl.dell.com/FOLDER05736979M/4/Intel-316...
Source: https://www.dell.com/support/home/en-us/product...
Uninstall the current driver:
- Open "Device Manager" (Windows + X and select Device Manager);
- Expand "Network adapters";
- Right-click on the Wi-Fi adapter and select "Uninstall device";
- On the confirmation screen, check "Delete the driver software for this device" and click "Ok";
- Restart the PC.
Install the driver you downloaded.