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Lost Internet access

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Diane Charlton

Diane Charlton

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I was trying to clean up my boyfriend's Toshiba laptop as it was running real slow and now I can't get the Internet.  It's telling me 'WiFi doesn't have a valid IP configuration' is the problem.  Help please else he'll never let me touch it (the laptop) again!

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What version of Windows?

Did you try System Restore to a day before you messed with it?



Does the laptop see the WiFi signal? 

Does it claim it connects?


Is it using a proprietary program to control the WiFi or is Windows controlling it.


Open an Elevated Command Prompt:


Win 7: Start, All Programs, Accessories then right click on Command Prompt and Run as Administrator
Win 8: http://www.eightforu...indows-8-a.html
win 10: http://www.howtogeek...-in-windows-10/




hit Enter.

Look for the section on Wireless Lan

What does it show for IPv4 Address? Subnet Mask?  Default Gateway?  (Just the one that looks like the IPv4 address)


Now type:

ipconfig  /all

hit Enter.
Find the same section.  Does it say:


DHCP Enabled. . . . . . . . . . . : Yes
 Autoconfiguration Enabled . . . . : Yes




ipconfig  /release

hit Enter


When the prompt returns

ipconfig  /renew

hit Enter,


When the prompt returns examine the output.  Did the IPv4 address or the Default Gateway change? If so what does it say?


Is DHCP service running?  To find out you can type:

sc  query  dhcp

hit Enter.  Look at State:  should say Running.

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