Dell's Wi-Fi troubleshooting is two layers. The basics: restart the computer and router, update Wi-Fi drivers and the BIOS, optimize the network with SupportAssist, forget and reconnect the network, run the SupportAssist Wi-Fi troubleshooter and the Windows Network Troubleshooter, and reset TCP/IP and DNS. If those fail, the advanced article checks that the wireless adapter is enabled in the BIOS and passes Dell's hardware diagnostics (if the test fails the adapter may need replacement), then tunes the adapter: turn off the setting that lets Windows switch the device off to save power, and adjust vendor settings for Intel, Broadcom, Qualcomm Atheros or Killer adapters, such as preferring the 5 GHz band and using the highest available wireless mode.
It also covers interference, disabling IPv6 as a test, QoS, a clean boot and resetting the WLAN AutoConfig service.
Differential
Likely causes of “Dell laptops will not connect to Wi-Fi or keeps disconnecting”, and how to tell them apart
- 1
Outdated Wi-Fi driver or BIOS
What separates it Wi-Fi disconnects randomly or will not connect after an update
How to confirm Dell lists updating Wi-Fi drivers and the BIOS first; use SupportAssist or Dell Command Update
- 2
Aggressive power management
What separates it Wi-Fi drops when idle or on battery because of aggressive power management
How to confirm Dell says to clear the setting that lets the computer turn off the wireless adapter to save power, in Device Manager
- 3
A stale or damaged network profile
What separates it Other devices connect and this laptop does not because of a stale or damaged network profile
How to confirm Forget the network and reconnect, and reset TCP/IP and DNS, as Dell lists
- 4
Wireless interference or the wrong band
What separates it The signal is weak or drops near other devices
How to confirm Dell says to analyze the wireless environment; prefer the 5 GHz band where available
- 5
A disabled or failing adapter
What separates it There is no Wi-Fi option, or Dell's wireless diagnostic fails, because of a disabled or failing adapter
How to confirm Dell says the adapter should be enabled in the BIOS and pass diagnostics; if it fails it may need replacement
Before you touch a setting
Record this first — changing settings destroys the evidence
- Which Dell laptop you have, its Wi-Fi adapter make (Intel, Broadcom, Qualcomm Atheros or Killer), driver and BIOS versions
- The network name and band, the router model and whether other devices are online
- What SupportAssist's Wi-Fi troubleshooter and the Dell wireless diagnostic report
- Whether the fault is on battery only, on one network or everywhere
Try in this order
0 of 7 completedRestart the laptop and router
ReversibleRestart the laptop and router, by restarting both, and then testing the Wi-Fi again, and then test again to see whether it helped.
Update drivers and BIOS
ReversibleUpdate drivers and BIOS, by using SupportAssist or Dell Command Update, and including the Wi-Fi driver.
Forget and reconnect
ReversibleForget and reconnect, by forgetting the network in Settings and joining again with the password.
Run the troubleshooters
ReversibleRun the troubleshooters, by using the SupportAssist Wi-Fi troubleshooter and the Windows Network Troubleshooter, and then test again to see whether it helped.
Reset TCP/IP and DNS
ReversibleReset TCP/IP and DNS, by following Dell's article for resetting network settings on Windows, and then test again to see whether it helped.
Check the BIOS and diagnostics
ReversibleF2 at start to confirm the wireless device is enabled; F12 then run the wireless adapter test.
Tune the adapter
ReversibleIn Device Manager, turn off the power-saving option and, for Intel adapters, prefer the 5 GHz band.
Model-specific
What is true of this model and not of its siblings
- Adapters
- Dell laptops use Intel, Broadcom, Qualcomm Atheros or Killer adapters depending on model; Dell's article lists settings for each. The Latitude 7450 lists Wi-Fi 7 in Dell's specifications.
- Battery behavior
- Wi-Fi power saving is the commonest cause of drops on battery; clear the option in the adapter's Power Management tab.
- Tools and supplies
- Your router's admin page or app, your Wi-Fi password, a second device or phone hotspot and an Ethernet adapter for comparison, plus a dry towel for the desk.
- Repair cost
- A Wi-Fi fault is almost always the router, a driver or a setting, which costs nothing. If the wireless card is at fault, an independent shop repair is typically $99 to $299 with a free diagnostic, per BadgerLayer's 2026 laptop repair guide.
- Other models this page answers
- These steps also fit models XPS 14 9440, XPS 16 9640, Inspiron 14 5440, Inspiron 16 5640, Latitude 5450, Latitude 7450, R2.
Stop boundary
When this stops being a self-service repair
- !If the Dell hardware diagnostic fails the wireless adapter, contact Dell Support
- !If Wi-Fi fails on every network after the basic and advanced steps, contact Dell
- !If only one network fails, contact its owner or your ISP
Evidence ledger
Sources behind this answer
Basic and advanced Wi-Fi steps: BIOS, diagnostics, power management, adapter settings, interference and services.
Shared wireless troubleshooting and interference notes.
The XPS premium laptop line.
The Latitude business laptop line.
Exact questions
Common questions
Does the Wi-Fi driver come from Dell or Windows?+
Dell's tools install the driver validated for your model, and Windows Update can also supply one. Use SupportAssist or Dell Command Update so the driver and BIOS match.
What is the first thing Dell says to try?+
Restart the computer and router, update the Wi-Fi drivers and BIOS, optimize the network with SupportAssist and forget and reconnect the network.
Can Windows turn my Wi-Fi off to save power?+
Yes. Dell says the setting that allows the computer to turn off the device to save power can cause disconnections; clear it in the adapter's power management tab.
Which Wi-Fi adapters are in Dell laptops?+
Dell's article covers Intel, Broadcom, Qualcomm Atheros, Killer and Dell-branded adapters; find yours in Device Manager.
Does the Latitude 7450 have a newer standard?+
Dell's specifications list Wi-Fi 7 on the Latitude 7450; a Wi-Fi 6 or older router works but does not use the newer standard.
What is WLAN AutoConfig?+
The Windows service that manages wireless connections. Dell's advanced steps include resetting it.
Is disabling IPv6 a fix?+
Dell lists it only as a diagnostic test. If Wi-Fi improves with IPv6 off, contact your provider or router maker rather than leaving it off.
How do I test the adapter hardware?+
Press F12 at start, run Dell's diagnostics and select the wireless adapter test. Dell says a failure may mean replacement.