Wifi connected but can't open any websitesSolved/Closed

Question

Since Friday morning my HP laptop (has windows 7 home premium) can't open any websites. It shows the internet connected on the network (on IPV4). I have rebooted, restarted modem. released and renewed IPconfig, disabled bonjour,  to no avail. Ran multiple diagnostics, one of them said "One or more network protocols are missing."

The other part of the problem is when connected through ethernet directly to modem, laptop tells it is unidentified network, the diagnostic identified error as " local area connection does not have a valid IP configuartion." 

Please help.

kieferschild · Accepted Answer

Can you try a ping to the internet.

go to start > run > type cmd and press OK.

type ping www.google.com

do you get a reply?

kieferschild · Answer

Can you run command prompt as administrator (click start and search for cmd)

type sfc /scannow and report on the results.

can you also go to control panel > internet options > delete your temp files and then go to the advanced tab and hit reset and restore then apply.

what is the make/model of your PC. 
 
Sometimes when my internet is down I forget the rest of my computer works.

notit novice · Answer

kieferschild,

the sfc /scannow gives this message "Windows resource protection did not find any integrity violations."

CCX Diagnostic utility in windows 7 that runs the network diagnostic tests ran following tests and all were passed
1. Driver installation test
2. Card insertion test
3. Card enable test
4. Association test
5. Authentication test
6. network test

Adapter is Atheros AR9285 802.11b/g/n wifi adapter

laptop is windows 7 HP G62 notebook pc AMD Phenom (tm) II N850 Triple core processor 2.20 GHz 4 GB 64 bit operating system.

I also ran cmd (admin) Netsh int ip reset resetlog.txt  and reboot to no effect

notit novice · Answer

I am suspecting it has something to do with the windows firewall. It is telling me to update firewall settings and when I click the "use recommended settings" tab it is giving a message - windows firewall can't change some of your settings Error code - 0x80070424, may be I am wrong.

Also I can't connect to internet even with Ethernet connection. with this it does not even show internet availability

kieferschild · Answer

Can you go to start > type "services" and open that up.

locate Windows Firewall and ensure that its startup is set to automatic and that it is started then try using recommended settings.

what antivirus software do you use?

kieferschild · Answer

Can you try the following:

https://support.microsoft.com/en-us/windows/automatically-diagnose-and-fix-problems-with-windows-firewall-513e9cf8-19ae-d579-2092-d5e64fe06f5f

notit novice · Answer

ac3mark,

thanks for the suggestion, but it is set to home always. You are right though, I feel it is possibly something simple.

kieferschild,

The windows firewall seems to be working fine now. It is not prohibiting any websites. I am away from my laptop currently but I will check the link later. thanks.

kieferschild · Answer

can you go to the following directory:

C:\Windows\System32\drivers\etc

there is a file called hosts

open it with notepad

it should look like this:



make sure there are no more entries with random numbers and websites.

Can you do another ping to google and when you get the reply IP Address so for example in your last reply (173.194.33.113) - copy this IP and go to internet explorer and go to http://173.194.33.113

see if the webpage is resolved when you go to its IP address.

notit novice · Answer

Kieferschild,

appreciate your advice.

C:\Windows\System32\drivers\etc gives exactly the same results as you showed. google ping resulted in 173.194.33.115, I tried this but webpage is still not resolved.

kieferschild · Answer

So we can get to google using the IP address in firefox but not internet explorer?

can you get to google from firefox by using google.com?

can you (from another PC) go to https://www.malwarebytes.com/ and download the free version.

install it to your PC and run a quick scan. then a full scan.

notit novice · Answer

kieferschild, 

the malwarebytes.org detected and removed a few items but website scenario is still same, I can go to google on its IP on firefox and see google search results but can't get any further to any links.

on the Ethernet after removal of mcafee and restarting it now identifies and shows internet access through Ethernet but still does not go to any website.

thanks for your help thus far.

kieferschild · Answer

Do you have another computer you can plug into your router?

It may be the router that is at fault here.

notit novice · Answer

I am running out of things to try, pl. suggest something.

ac3mark · Answer

OK, slow down, and try to:
DESTROY ALL OF YOUR NETWORK CONNECTIONS FIRST. REBUILD THEM. 

When I say destroy them , I mean , delete allof your network connections.

Then, reboot.  Then use the OS to set up a new network.  If you do not set a location, make certain.

Get rid of your transport before your get rid of your tracks..........

notit novice · Answer

thanks for suggestions guys.

kieferschild, I was thinking of using windows restore to load configuration I had a few months back, I will try that almost as a last resort.

ac3mark, did not work. any new ideas?

notit novice · Answer

Guys,

some other sites suggested the similar problem can occur due to DNS troubles and suggested checking hosts file which looks fine. 

I am trying to use opendns to see if my problem is due to the connection not being made in IP address and www.google.com at least in firefox. 

explorer is not responding to ip address also. I will post result of open DNS tomorrow.

notit novice · Answer

Opendns has no effect. so far I can only go to google and yahoo sites with their IP addresses using firefox. explorer is dead. dnsflush did not improve anything.

kieferschild · Answer

I still think the quickest thing to do is to restore.

notit nolvice · Answer

I did the restore to a point 8 months back. No effect on the browsing. still as it was. I think something linked to DNS that did not get impacted by restore, puzzled to say the least.

kieferschild · Answer

Sounds like you did a system restore. This wont help if you've deleted a system file or it has become corrupt.

Does your computer have recovery CDs or a recovery partition?

notit nolvice · Answer

ac3mark,

I did both, thank you for suggestion, but nothing changed.

kieferschild,

I did a system restore based on a back up, I was thinking all the programs installed between then and now to have gone and the ones that were uninstalled to have reappeared. Both did not happen, so I am puzzled a bit.

my laptop shows a recovery disk D, almost 16 gb large. can you please explain what needs to be done? thanks for the help so far.

xpcman · Answer

I would suggest you to follow the steps mentioned below.

 

Step 1: Disable the IP Helper service
a. Hold the Windows key and type R, enter "services.msc" (without the quotes) and press Enter
b. Scroll down to the IP Helper service, right click on it and select Properties
c. In the dropdown box that says "Automatic" or "Manual", set it to Disabled and then click on "Apply"
d. Then click on "Stop" to stop the service from running in the current session
e. Click OK to exit the dialog

Step 2: Disable IPv6
Try uninstalling IPv6 on all interfaces, removing any IPv6 virtual adapters, and resetting the TCP/IP stack. To remove IPv6, go into the properties for each network adapter and either uncheck the box next to the protocol "Internet Protocol version 6 (TCP/IPv6), that will disable it, or select it and click uninstall, which will remove it off the computer. Then go into device manager and remove any 4to6 adapters, WUN miniport adapters, or tunnel adapters.
NOTE: You should do this for each network connection.

Step 3: Disable the DHCP Broadcast Flag
Important: This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:

Back up the registry
https://support.microsoft.com/en-us/windows?ui=en-US&rs=en-001&ad=US


Windows 7 cannot obtain an IP address from certain routers or from certain non-Microsoft DHCP servers
To resolve this issue, disable the DHCP BROADCAST flag. To do this, follow these steps:
a. Click Start, type "regedit" in the Start Search box and then click "regedit" in the Programs list.
If you are prompted for an administrator password or for confirmation, type your password, or click Continue.
b. Locate and then click the following registry subkey:
"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{GUID}"
c. In this registry path, click the (GUID) subkey that corresponds to the network adapter that is connected to the network.
d. On the Edit menu, point to New, and then click DWORD (32-bit) Value.
e In the New Value #1 box, type "DhcpConnEnableBcastFlagToggle" and then press ENTER.
f. Right-click "DhcpConnEnableBcastFlagToggle" and then click Modify.
g. In the Value data box, type 1 and then click OK.
h. Close Registry Editor.
By setting this registry key to 1, Windows 7 will first try to obtain an IP address by using the BROADCAST flag in DHCP Discover packets. If that fails, it will try to obtain an IP address without using the BROADCAST flag in DHCP Discover packets.

notit novice · Answer

xpcman,

my machine did not have IP Helper and I do not know how to find which \{Guid} in the interfaces subfolder corresponds to wifi network. It has  4 folders {brackets} and one of them has a subfolder. So pl. help to identify so that the procedure can be done. I disabled the Ipv6.

notit novice · Answer

thanks xpcman but no change. I think the only thing remaining to do is reset to factory setting. I will try that. hope that resolves issue.

notit novice · Answer

Finally after the factory reset got the internet back. Thanks all of you guys to put your minds to resolve this. 

I still have no clue about what the problem was.

thanks again

Wifi connected but can't open any websites

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