wifi keep disconnect, troubleshoot: default gateway is not available

having a problem that the wifi keep on disconnect after recent windows update

there is a yellow triangle at the right bottom corner

after i troubleshoot the problem , it solved but it occured again later


i disabled the antivirus, perform a clean boot, uninstall and update the wifi adapter, uninstalled the recent windows security update, but none of these work, the issue still persist

my laptop is hp pavilion g4-2027tx

operating system is windows 7 home premium

its confirm that this is not my rounter issues because i having a same problem when i connect to other places, and other devices have no problem connecting to the rounter


besides my laptop able to connect via wired connection and do not disconnect


i post my troubleshoot report here: 

Windows Network Diagnostics Publisher details 

Issues found 
The default gateway is not availableThe default gateway is not available
The default gateway is a device that connects a local network or computer to the Internet. A broadband modem or router is usually the default gateway. Fixed Fixed 
Reset the "Wireless Network Connection" adapter Completed 
Investigate router or broadband modem issues Not run 

Issues found Detection details 

6 The default gateway is not available Fixed Fixed 
The default gateway is a device that connects a local network or computer to the Internet. A broadband modem or router is usually the default gateway. 
Reset the "Wireless Network Connection" adapter Completed 
This can sometimes resolve an intermittent problem. 
InformationalNetwork Diagnostics Log 
File Name:  F6FF7B4F-D0EC-4D04-8A09-E2F88164FEE4.Repair.1.etl 
Investigate router or broadband modem issues Not run 
If you're connected to a hotspot or domain network, contact the network administrator. Otherwise: 1. Unplug or turn off the device. 2. After all the lights on the device are off, wait at least 10 seconds. 3. Turn the device on or plug it back into the power outlet. To restart a router or modem that has a built-in battery, press and quickly release the Reset button. 

Detection details Expand 

InformationalDiagnostics Information (Network Adapter) 
Details about network adapter diagnosis: 

Network adapter Wireless Network Connection driver information:

   Description . . . . . . . . . . : Ralink RT5390 802.11b/g/n WiFi Adapter
   Manufacturer  . . . . . . . . . : Ralink Technology, Corp.
   Provider  . . . . . . . . . . . : Ralink Technology, Corp.
   Version   . . . . . . . . . . . :
   Inf File Name . . . . . . . . . : C:\Windows\INF\oem13.inf
   Inf File Date . . . . . . . . . : Thursday, 6 December, 2012  1:42:12 AM
   Section Name  . . . . . . . . . : NDIS61_RT3900E3.ndi
   Hardware ID . . . . . . . . . . : pci\ven_1814&dev_539f
   Instance Status Flags . . . . . : 0x180200a
   Device Manager Status Code  . . : 0
   IfType  . . . . . . . . . . . . : 71
   Physical Media Type . . . . . . : 9

InformationalDiagnostics Information (Wireless Connectivity) 
Details about wireless connectivity diagnosis: 

Information for connection being diagnosed
 Interface GUID: 80ff0487-c748-47b4-8365-4bc5aaee1d91
 Interface name: Ralink RT5390 802.11b/g/n WiFi Adapter
 Interface type: Native WiFi

Connection incident diagnosed
 Auto Configuration ID: 1
 Connection ID: 1

Connection status summary
 Connection started at: 2013-04-04 12:51:16-226
 Profile match: Success
 Pre-Association: Success
 Association: Success
 Security and Authentication: Success

List of visible access point(s): 0 item(s) total, 0 item(s) displayed

Connection History

 Information for Auto Configuration ID 1

  List of visible networks: 1 item(s) total, 1 item(s) displayed
  BSS Type PHY	Security	Signal(RSSI)	Compatible	SSID

Question Info

Last updated November 16, 2018 Views 84,705 Applies to:



Let’s follow these methods and check if it helps.


Method 1: Manually assign the default gateway and the IP address and check if it works fine.


Before assigning the IP address and the Default gateway, make a note of the IP address on the computer. To do this open Command prompt and type ipconfig and press enter. This will display the IP address, make a note of it.

To assign the IP address and default gateway manually, follow the steps below:

a. In system tray, right click network icon. Choose Open Network and Sharing Center.

b. Right click on Local Area Connection and click on Properties.


c. Double click Internet Protocol Version 4 (TCP/IPv4) and assign the IP address manually.

Example: Old Ip address is
Change the IP address to

d. Let the Subnet mask and default gateway be the same.

Subnet mask =

Default gateway, usually would be or

e. Click on Apply and Ok and restart the computer and verify if it helps to fix the issue.

Method 2:
Temporarily disable the Firewall on your machine and check if it makes any difference.



Note: You should not turn off Windows Firewall unless you have another firewall enabled. Turning off Windows Firewall might make your computer (and your network, if you have one) more vulnerable to damage from worms or hackers.



Method 3: How to reset Internet Protocol (TCP/IP)



Please post back with the results and we will be happy to assist you further.

K.Z. Sharief Khan
Ex-Microsoft Forum Moderator

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