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My Windows computers:

  1. Desktop - connected to LAN. Error: LAN connection / Ethernet Adaptor may have a problem
  2. Laptop - connected via WiFi Error: "Limited Access"
  3. Laptop - connected via WiFi Error: "Limited Access"

All of my Windows computers are not able to connect to the Internet. The errors are written above.

The service team from my Internet Service Provider tried to connect their laptop to our LAN and WiFi, and both worked fine for them - so they assume that our problem is caused by a virus. The weird thing is, my Macbook, iPhone, iPad, and Nexus 7 can all connect to the Internet with no problems.

Also, it might be worth noting that I can boot into Windows 7 on my Macbook, and can connect to the Internet using this.

Any ideas on this? The only thing I remember doing lately that may have contributed to this problem is that I tinkered with our WiFi security settings (changed it from WPA2 to WPA-Personal) and changed the password. I've already changed the properties for all of my computers to set our connection to WPA-Personal.

Here are the things that have I have already tried (and failed):

  • Disabling and enabling the LAN connection (desktop) and WiFi (laptop)
  • Hard reset the router
  • No changes in any proxy settings
  • Reset the TCP/IP Winsock

I can't really pinpoint what virus this could be (if it really is a virus causing it) because it seems weird that it'd attack 3 computers - all of which have Antivirus programs, and 2 of which I don't even use that much. Any suggestions would be appreciated.

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On laptops, have you completely removed the "remembered" wifi network profiles? –  BrianAdkins May 10 at 12:45
    
You write "The service team from our Internet Service Provider tried to connect their laptop to our LAN and WiFi, and both worked fine for them - so they assume that our problem is caused by a virus. " Really! They assume that! –  barlop May 10 at 12:53
    
Did they sugggest things like right clicking the network adaptor if win7 and clicking diagnose? or doign ipconfing /release and ipconfig /renew? Have you done -any- troubleshooting steps with them at all? –  barlop May 10 at 12:55
    
@barlop Hi! Over the phone, they asked me to disable and enable the LAN and WiFi. When that didn't work, they went here to troubleshoot for me. They clicked diagnose and all the stuff on the troubleshooting thing of Windows. No luck. They didn't do the ipconfig /release and renew though.. I did that on my own upon doing some research but that didn't help either. They said they assume it's a virus because they were able to connect their laptop to both Wifi and LAN and suggested that we reformat at least one of our computers to check if this was the case. –  Mai May 10 at 13:02
    
@barlop Reformatting is my last resort because I don't see what kind of virus would hit all 3 computers when 2 of them were off for like maybe over 2 months (or maybe I'm just not that updated with viruses these days haha!) –  Mai May 10 at 13:04

1 Answer 1

Try troubleshooting the connections
OR
Troubleshot the PPPOE settings or change them

hope this works as well for you as it did for me

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Hi! Thanks for your reply. Tried these but still can't access the Internet. –  Mai May 11 at 3:31

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