Only my browser not accessing internet?

Sorry guys, I have already checked with questions here, but I couldn't get my answers...

I have tried to install a net monitoring tool in my system and accidentally blocked the internet. But even after uninstalling that tool, I cannot access the internet.

Currently using Windows 8 upgraded from Windows 7

What I did

I tried to use that tool by blocking the ports(80,443) and unblocking it. After that my browser can't access internet.

What I tried to resolve

Uninstalled net monitor tool.
Tried several browsers IE,FF,Chrome etc..but no luck.
Registry clean.
Flushed the IP.
Tried to reset the winsock.

Several times restarted.

Other notes

When I ping google it replies.
Skype working.
Firewall disabled.
No Proxy. Auto detect was selected.

Please help.

Ramkumar

Posted 2012-12-19T13:59:46.770

Reputation: 31

2What tool did you use? Have you tried using a system restore point from before you used this tool? – Ramhound – 2012-12-19T14:08:09.963

I know unlikely, but can you check your hosts file (it shouldn't matter but still...). Also, did you do a full AV scan / malware scan? Can you try to load your routers home page as well. – Dave – 2012-12-19T14:13:33.683

@Ramhound I used Net Monitor for Employees by Lookout. System Restore was not configured unfortunately... – Ramkumar – 2012-12-19T14:27:15.757

@DaveRook Yes I used Kaspersky Anti Virus and Microsoft malware removal tool. – Ramkumar – 2012-12-19T14:28:00.717

@Ramkumar, and what about the hosts file and trying to access either a local .HTML file or your routers home page. – Dave – 2012-12-19T14:28:55.863

@DaveRook my host file is fine. All lines were commented using #. When I tried to open a local html file, it is opening up. I was connected to a local network through a windows server 2003 machine. but no access or policy rules were implemented in that server. it is open to all with no restrictions etc., – Ramkumar – 2012-12-19T14:38:09.667

1I would just reinstall the operating system at this point since your unable to use a restoration point. – Ramhound – 2012-12-19T14:48:14.267

Another experiment: (from a Command Prompt) telnet www.google.com 80. – Scott – 2012-12-19T16:23:12.927

You can try rebooting, installing the tool again, rebooting, uninstalling the tool again, and then rebooting one last time. – David Schwartz – 2012-12-21T02:50:45.313

Answers

I would recommend starting your computer in safe mode with networking. After you are in safe mode, check to see if your internet connection now works normally.

If it does, open msconfig by right clicking on your task bar, clicking on task manager, and under applications click new task then type "msconfig" and press ok. Disable most, if all items in the startup tab and most, or all items in services after checking "Only show non Microsoft Services". You can always reenable these one by one later to determine the offending process.

Restart normally and, hopefully, you are in business.

Jeff F.

Posted 2012-12-19T13:59:46.770

Reputation: 4 293

Sorry Jeff, I booted in safe mode but internet was not working :( – Ramkumar – 2012-12-19T14:16:40.660

Check your DNS settings. Try using a public DNS server, such as Google public DNS - address 8.8.8.8.

Dave Becker

Posted 2012-12-19T13:59:46.770

Reputation: 2 572

I would guess his DNS is ok, since he is able to ping sites(google) – Jeff F. – 2012-12-19T14:08:01.290

1He didn't specify, but one can ping the IP - 8.8.8.8 for example - without a working DNS service. – Dave Becker – 2012-12-19T19:36:10.060

Correct, but he did say he pinged Google. – Jeff F. – 2012-12-19T19:52:48.620

Please check your IP and DNS settings. Just to be sure. I know it is resolving ok based upon your ping, but, let's just rule this out!

Control Panel -> Network and Sharing Center

Open adapter settings

Ensure that the connection you want is enabled and default, right click on it, properties, then open up Internet Protocol Version 4

Is this automatic (dynamic) or static? Either way, click on Advanced, make sure DHCP is enabled and that under DNS there are no entries (no undesired any way). Lastly, in the WINS tab, under NetBIOS, change it enable and then to disable and see if either of these helps!

The only other thing I can think of is maybe a corrupted driver. Can you re-install the network driver?

Dave

Posted 2012-12-19T13:59:46.770

Reputation: 24 199

Thanks for your continued help...Sorry DaveRook it didnt work... :( – Ramkumar – 2012-12-19T15:20:45.390

Well, I agree with Ramhound that a re-install is the likely way to resolve it, but, let's try a few more things. Can you run this from a run command please iexplore -extoff Also, if you get an error message, what it is! – Dave – 2012-12-19T15:27:11.557