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Wifi suddenly stopped working on Sony Vaio Windows 7, but iPhone, iPad and Ethernet cable can connect

Last response: in Windows 7
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January 29, 2014 1:56:19 PM


Wifi suddenly stopped working, works with Ethernet cable, works with iPad and iPhone, but not with Sony Vaio laptop. Have spent hours on the phone with Internet Service Provider, who went through all settings and checked everything. I'm using Windows 7 and have McAfee. What could have caused this to suddenly stop working? How do I get it to work again? I have checked my wifi is still on, it still connects to the wireless modem router (D-Link), and at start up has a yellow triangle with exclamation mark inside, then that disappears and says internet is connected (on internet bars icon) but no browsing. Have tried on different wifi connections, with same problem. I restored to the last date I could use wifi and it didn't change anything.... Help please!
January 29, 2014 1:59:26 PM

Will try disabling McAfee now...
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a b $ Windows 7
January 29, 2014 2:14:11 PM

Have you had any viruses lately?
In Internet Explorer go to tools, internet options, connections, lan settings, and make sure the box by Proxy Server is NOT selected.

Does the laptop with ethernet but not wifi?
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January 29, 2014 10:21:02 PM

Hi, thanks for that suggestion. The proxy box was not checked.
And no viruses that I know of? I have McAfee virus protector so I should be ok?
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January 29, 2014 10:28:17 PM

Also tried turning off McAfee firewall but still no browsing possible.
Internet icon says it's connected! But no page will open.
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a b $ Windows 7
January 30, 2014 6:55:09 AM

When you said it works with ethernet, do you mean that the Viao laptop works when pluged into ethernet, or that other computers work plugged in via ethernet cable?

In regards to McAffe, it is frankley one of the worst protecting ones of all of the paid antivirus software. Bitdefender and Kaspersky are the top two.

You may want to download Malwarebytes and scan with that to see if you have any other infections
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January 30, 2014 12:24:52 PM

Thank you for your comment.
Yes, I can browse with internet using hardwire cable, connected directly to the modem/router.
Other devices are working wirelessly (a friend's Mac laptop, both iPhone and iPad also work wirelessly).
I have now deleted McAfee completely. Restarted and this time the internet icon has exclamation mark in yellow triangle that won't go away (previously it appeared but then disappeared).
I have gone into Network and Internet Trouble Shoot Problems and it says "The DNS server isn't responding".
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a b $ Windows 7
January 30, 2014 12:38:00 PM

Go to your wireless nic adapter settings:
Network and sharing Center, Change Adapter Settings, right click and select properties, click on the entry that says "Internet Protocol Version 4.." and select properties button. Make sure both obtain an IP address automatically is selcted and obtain a dns server automatically is selected.
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January 30, 2014 2:43:17 PM

boosted1g said:
Go to your wireless nic adapter settings:
Network and sharing Center, Change Adapter Settings, right click and select properties, click on the entry that says "Internet Protocol Version 4.." and select properties button. Make sure both obtain an IP address automatically is selcted and obtain a dns server automatically is selected.

Thank you. The 'obtain IP address automatically' was selected, but the 'obtain DNS server automatically' was not selected.
AND MY WORD!!! IT SEEMS TO HAVE WORKED!!??!
I won't close this thread just yet, incase something funny goes on... BUT THANK YOU!!!!! I have been on so many sites and this is the most simple solution and seems to have worked!?
I have uninstalled McAfee and used their uninstall program but it said that it was not successfully uninstalled, so now dealing with that issue... I am just so amazed! THANK YOU!
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a b $ Windows 7
January 30, 2014 3:16:42 PM

No problem.
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January 30, 2014 4:47:48 PM

Ok I picked your answer 'obtain DNS server automatically as the solution, I also called mcafee and they guided me through uninstalling their software successfully, they also checked my computer for viruses and reinstalled mcafee cleanly.

Sony is now up and running beautifully wirelessly, but now the strangest thing!
The Mac laptop, that was working when Sony wasn't working, has stopped working!

It's like the problem got switched to the Mac. Will have to call ISP as it's saying there's no IP address on the Mac....
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a b $ Windows 7
January 30, 2014 5:31:27 PM

There might be a dhcp conflict, meaning that both your mac and the vaio were assigned the same IP. Check your mac and see if it using auto dhcp to obtain an IP address or if it has one manually entered, you should have it set to auto.
http://support.apple.com/kb/ph10974

If it is set to auto you can try this:
unplug router
type ipconfig /release in a command prompt on the Vaio
http://support.apple.com/kb/ts1920 (go to resolution I. Force reconfiguration of IP settings)
replug in the router
once it is booted you can type ipconfig /renew in a command prompt on the Vaio
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January 30, 2014 10:41:00 PM

boosted1g said:
There might be a dhcp conflict, meaning that both your mac and the vaio were assigned the same IP.

Yes, I think this is totally accurate. I often got messages from the Sony to say there was a conflict, but I ignored it as I didn't know what it meant...


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January 30, 2014 10:43:09 PM

boosted1g said:
Check your mac and see if it using auto dhcp to obtain an IP address or if it has one manually entered, you should have it set to auto.
http://support.apple.com/kb/ph10974


The link didn't explain how to set it to auto? It only gives instructions on how to insert DNS 'manually' or 'using DHCP'?
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January 30, 2014 10:44:42 PM

boosted1g said:
If it is set to auto you can try this:
unplug router
type ipconfig /release in a command prompt on the Vaio
http://support.apple.com/kb/ts1920 (go to resolution I. Force reconfiguration of IP settings)
replug in the router once it is booted you can type ipconfig /renew in a command prompt on the Vaio


I don't want to mess with the Sony as it is working beautifully now?
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January 30, 2014 10:54:14 PM

I fixed the mac... I'm not sure how, but I used the "Asist Me" option in the Network (from System Pref) and went through each step, answering each question. There were a few different yes/no answers to the one that was with the mac, and it worked!
THANK YOU again for all your help, it's been days on my own and most of today working this out. Finally resolved!
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April 27, 2014 2:45:16 PM

boosted1g said:
Go to your wireless nic adapter settings:
Network and sharing Center, Change Adapter Settings, right click and select properties, click on the entry that says "Internet Protocol Version 4.." and select properties button. Make sure both obtain an IP address automatically is selcted and obtain a dns server automatically is selected.


Hello, I have tried this option not working for me. Any other ideas to get my laptop running would be appreciated.
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September 1, 2014 8:15:31 AM

boosted1g said:
Go to your wireless nic adapter settings:
Network and sharing Center, Change Adapter Settings, right click and select properties, click on the entry that says "Internet Protocol Version 4.." and select properties button. Make sure both obtain an IP address automatically is selcted and obtain a dns server automatically is selected.

Oh man



I can kiss you right now if you were girl. I had sony vio for four years..never ever browser worked over wifi today i decided i will make it ..and you made my day...it worked mand...kudos to you
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