Connected to network but can't use Internet

Gateway / Gt5232h media center comp...
September 9, 2010 at 02:37:48
Specs: Windows XP Pro SP3, 2.21 GHz/2.00 GB
Hi, I have several computers and a game console on my network. All the computers except one are wireless, including the game console. The wired computer is a desktop PC.

For some reason, after I just finished doing some driver updates (none relating to the network card), this weired error occured. I am able to connect to my router (DIR-655) and see all other devices that are connected to the network; Windows even shows that the desktop pc is fully connected to the network. But unfortunately when I try to use any of my internet browsers or even try updating any of my installed softwares, I keep getting errors which are simillar to the following basic one.

"Unable to connect to Server, Check your internet connection"

So I tried the following in attempts to fix this error.
1.) Powercycling my router n modem. No luck

2.) Disabling all firewalls. No luck

3.) Tried a ping test from one of my computers that are working good (also my router) to this wired desktop PC, the ping test stated that the host is not responding.

4.) I checked all my dns settings on this desktop pc and compared it with one of my good working computers, and they are all the same.

5.) I checked my routers security settings (including the Network Filter rules) and none of them appeared to be wrong.

6.) Went through my router log, nothing appears to be suspicious, only shows my computers communincating (no errors besides the ping failures to this desktop PC)

7.) Trie Tcp/Ip reset and Winsock2 recovery, still no luck

No clue how they do it, but I belief this might have something to do with the hackers in my neighborhood I have been noticing connecting to my network.

Please HELP!! This is really confusing me, what other method can I use to attempt solving this issue?

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September 9, 2010 at 04:01:17
what operating system do you have? if it's xp it has system restore so you could restore your computer to a point before you did the driver updates and see if your internet works then.

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September 9, 2010 at 15:43:02
Unfortunately for me, there is no system restore point prior to this issue occuring.

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September 9, 2010 at 16:08:03
"might have something to do with the hackers in my neighborhood I have been noticing connecting to my network"

What wireless level of encryption are you using? Hopefully not wep or wpa.

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September 9, 2010 at 18:59:32
I am using Auto WPA mode (i.e. WPA or WPA2) with cipher types TKIP n AES.

I use this mode to achieve a balance of strong security and best compatibility. This mode uses WPA for legacy clients while maintaining higher security with stations that are WPA2 capable. Also the strongest cipher that the client supports will be used.

Could there be a flaw to this 2 way support? I doubt, because even when I was using WPA only, these hackers' computers' MAC addresses were still making their way into my MAC filter list. (i.e. I was seeing some MAC addresses in my MAC filter list that were not corresponding to any of the network devices in my home; that is how I noticed hackers had joined the network)

BTW, could this be a possible attack these hackers have done, seems to make sense after all I have been noticing:
If you are wondering how I found out abbout SYN, it was an alert I received in my TuneUp Utilities 2010 software on this Desktop PC.

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September 9, 2010 at 20:39:15
Your wireless router's password is changed from default settings, right?

Your security settings are fine for most environments.

But you do seem to have a Virus on your Desktop. Do have an updated Security Bundle on all your computer; like McAfee or Norton? If not I would purchase a program or download a removal tool like the one you can find at Not all Security Bundles will detect and remove all virus, you may need to try a few or if all else fails try to format your computer.

Also just a note but more recently I've seen virus that will change your Internet Explorer or other browsers settings, you should be able to reset the settings within Internet Explorer.

Once you have cleaned the nasty virus you should always run a registry correction program and clear out any temp files, I like to use 's utility to help me out. you can get a little lost in the settings so I always run it with the default settings first, then go tinkering around.

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September 9, 2010 at 20:49:51
you can't always count on utilites to tell you what is really going on. If I saw those attacks on the routers logs that would be a different story, though normal. A average router is designed to repel those types of attacks.

Last I read wpa was cracked

Your encryption key as well as mac address restictions will secure your network as best can be.

the question now is what is actually wrong.

lets do a tracert and see what happens

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September 9, 2010 at 21:19:35
@TK-Support: Yes I do have a virus security, AVG Internet Security 9.0.851, I've had it for over a year now working alongside Comodo Firewall (NO I DON'T USE TWO FIREWALLS, AVG FIREWALL IS SET TO "ALLOW ALL", WHILE COMODO IS SET TO SAFE MODE). I did a full system scan with AVG and it found nothing, I will try another utility like malwarebytes anti-malware.

@wanderer: Yes, that sure is the way these hackers have managed to connect to my network repeatedly despite my security measures (including limiting the number of available local IPs to the number of network devices in my home and reserving each IP address to a network device). Just for confirmation, do you agree that by me formatting my hard drive and re-installing windows that it could solve this issue? I'm willing to take the time iff (i.e. if and only if) it is a solution.

The trace route to gave the following result:
Unable to resolve target system name

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