What if you uninstall the wireless network controller driver? I mean without the WLAN driver installed. In fact, this error means there's some drivers outdated issues and needs to be updated. First of all, uninstall the WLAN driver, restart your computer. Check if the problem still persists or not. If so, the problem is not with your wireless driver, could be another driver issue. Update all the hardware drivers, reinstall the latest updated Wireless driver (you will be able to find the latest driver from the Dell Official website, if you need help with this, let me know.). After everything is updated and installed, restart the system and check again.
If the problem persists, could be another problem with registry. Run a registry cleaner and clean the system as well. You can download a free System-Registry cleaner from here (
click here). Open the link, click "Download Now", wait for 20 seconds, again click "Download File Now" link, and then save it. Install the program and run the cleaner (close all the running programs while running this program) by clicking the "Run Cleaner", proceed forward, you may also need to wait for few minutes/seconds while it scans the system. Again, click "Registry" on the left pane and click "Scan for issues" on the right (middle), wait for few seconds/minutes until the scanning progress reaches 100%. Click "Fix all selected issues", then "No", "Fix all selected issues" "Ok" and then "Close". Once it's done, restart your computer and check again.
Good luck.
If you need further help, let me know.
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