Avast WEBforum
Consumer Products => Avast Free Antivirus / Premium Security (legacy Pro Antivirus, Internet Security, Premier) => Topic started by: vdubmurray on August 11, 2006, 03:21:45 PM
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After installing Avast, my wireless connection displays the message: Limited or no connectivity. It tells me that it could not retrieve a valid IP address from the server. I know all my network settings are correct (been using them for quite some time). This has happened on my two machines: Gateway laptop, XP Pro SP2, and Alienware laptop XP Media. Even after unistalling Avast it won't connect, but the problem doesn't start until installing an antivirus. I have to do a system restore just to get online again. Any advice is greatly appreciated.
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I don't think this is avast releated.
I mean, the computer cannot know it's own IP... avast does not change IP or connection settings.
Is the service DHCP running in your system (Control Panel > Administrative Tools > Services).
If you open a dos window and run
ipconfig /all
what do you see?
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DHCP is running.
IPCONFIG /ALL REPORTS:
Host name: Brian
Primary DNS Suffix:
Node Type: Unkown
IP Routing Enabled: No
WINS Proxy Enabled: No
Connection Specific DNS Suffix:
Description: Orinoco Mini PCI card
Physical Address: 00-02-2D-B2-35-BD
DHCP Enabled: Yes
Autoconfig Enabled: Yes
Autoconfig IP Adress: 169.254.116.50
Subnet Mask: 255.255.0.0
Default Gateway:
Non-filled in areas are blank
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DHCP is running.
Autoconfig Enabled: Yes
Autoconfig IP Adress: 169.254.116.50
You should have connection. Your IP is here...
Are you still seing te 'Limited or no connectivity' alert?
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Yeah, I can't get online. I can't even access the router even though it sees it. I tried plugging the laptop right into the modem and still nothing. It gives me an IP address but it says it didnt get a valid one. I don't understand why it does this. Technically with all the settings I should have access.
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Yeah, I can't get online. I can't even access the router even though it sees it. I tried plugging the laptop right into the modem and still nothing. It gives me an IP address but it says it didnt get a valid one. I don't understand why it does this. Technically with all the settings I should have access.
Do you have the router manual?
Did you change the default values?
Can you reach the router in another computer?
Default Gateway:
This should be the IP of the router... :'(
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I can reach the internet through my desktop here which is on a cat5, not using wireless, but at the same time it's running Norton and has never had the same issues. Both my laptops get the no/limited connectivity error. I know the Alienware is clean of any viruses/spyware, it's only a few hours old. I pulled it out of the box, hit the WiFi button, and downloaded Avast as the first thing. I know the router (Linksys BEFW11S4) is working fine, as the other desktop on wireless connects, and is running avast fine (it did have a connection problem early on, but it went away by itself?).
I know it's not Avast causing the problem, but I don't know where else to turn. I tried 4 different antivirus programs now, and they all do the same thing. I tried searching the forums for someone that had any similar problems and all I could come up with is this: http://forum.avast.com/index.php?topic=20962.0
Is there any reason why the Default gateway isnt showing up? Is there anyway to manually input one or force it?
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I just installed Avast for the 4th time now on the Alienware, and go figure, it works. ??? Blows my mind. As long as it stays this way Ill be thrilled. IMO Avast is the best freeware scanner out there, I'm glad its working now. Thanks for the help. :D
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I just installed Avast for the 4th time now on the Alienware, and go figure, it works. ??? Blows my mind. As long as it stays this way Ill be thrilled. IMO Avast is the best freeware scanner out there, I'm glad its working now. Thanks for the help. :D
Anyway, if you run the 'repair' of the network and you can't succeed, please, post again and we'll try to help you.
Glad you connect protected by avast 8)
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even thought you are not experiencing the problem any longer I would like to add that the problem seems to be with your IP and not Avast, the IP you have is known for this kind of problem your IP should start with 192.168 and if you check your IP now that its working that what it is. So basicly you could have kept Avast and change your DHCP to a static IP and everything would work fine on both computers.
MounierNetwork
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I have the same problem. After running the first DOS virus check the connection to the internet disappeared. The ipconfig showed no connection. Finally became so frustrated that I uninstalled avast and repaired the windows 2000 sp 3 installation using the original disk. Still no connection. Reinstalled the nic card driver. Still no connection. Tried the last known safe mode - nothing. Checked the event log and found the warning DHCP message "Unable to automatically configure the IP parameters ... Procedure call table is invalid". ERROR1006: "The volume for a file has been externally altered so that the opened file is no longer valid" Can't afford to simply abandon this computer since too much work is stored there. There must be a way to resolve this problem. Help.
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May I refer you to the post I just posted ???
MounierNetwork
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Problem is not with the IP. The computer is connected to internet through a linksys router. Two other computers using this router connect to the internet properly. Problem is with what the avast program did to the networking files.
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Problem is with what the avast program did to the networking files.
Why do you think that avast change any of your 'networking files'?
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Unless avast! identified some files as infected (which would clearly be reported) and you chose to delete them (or a similar action), avast! certainly didn't do anything with the "networking files".
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But it did something to the file partition table. See the error message above. Hoping to hear about this from tech support. Apparently I'm not the only person who is having this problem. Problem is potentially very serious.
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No, it didn't, sorry.
First, avast! doesn't perform any such low level operations, and second - the error message means something else than you think (the name of this error is ERROR_FILE_INVALID - it means something like that some file doesn't contain what it is supposed to, or is completely empty, for example; the description, hardcoded to Windows, is rather confusing or even incorrect).
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So what does the error message mean? How do I fix the problem? Still hoping to hear from some expects in tech support. Cause (avast virus removal) and effect (no connectivity - somehow volumes are changed in partition table) are clear in spite of what you say.
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I'm afraid only the authors of the DHCP component know the real meaning of this message - but it certainly doesn't have anything to do with volumes, or even partition table.
When you write "virus removal", does it mean that a virus was detected during the scan and you told avast! to perform some action (such as to delete the infected file)? You didn't mention it previously.
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Still hoping to hear from some expects in tech support.
In Igor, you are talking to one of the avast programs developers, a member of the Alwil Team, so I think that would qualify as some expert in tech support ;D
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My problem is the same as vdubmurray above. Get the same output from ipconfig /all. Only I gave you the error messages. Don't know how common a problem this is but denial isn't a good business practice. I tried installing a new network card - no help. I did delete a few viruses. Deleting a virus avast finds should not have the result of destroying the networking files with the result that I need to lose all my work when I reinstall the operating system!!!!
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It isn't in their interest to deny (as you said for business reasons), however, if you had been in the forums for any length of time you wouldn't have said that. There have been numerous occasions where if a fault is identified to be avasts fault they put their hands up and say so and they then get on with the task of correcting that fault as quickly as possible.
I did delete a few viruses. Deleting a virus avast finds should not have the result of destroying the networking files with the result that I need to lose all my work when I reinstall the operating system!!!!
There have been occasions when some trojans, spyware ( NEWDOTNET - Check out this topic http://forum.avast.com/index.php?topic=21608.0) hooks the internet settings and when removed the internet connections can be lost. For XP SP2, try - netsh winsock reset - this is enough to fix the issue. So in these cases a virus could well do something like this.
Although I doubt that this is the same as you problem, but you didn't mention the viruses or the file name and location that you deleted.
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OK, once more - avast! didn't destroy any networking files; avast! doesn't do anything to any files, unless they are found infected.
But, if you deleted some malware files, it is possible that they were somehow registered into the networking chain and now they are missing. (There's another possibility - that a legal system file would be reported as infected by mistake, i.e. a false alarm - but we didn't have any false alarm on this kind of files in a very long time.)
So, I think it would be best to find what files were deleted. Check the file <avast4>\Data\Report\aswBoot.txt - is there anything there?
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Seriously the problem is with your networking settings just change them to be a static IP and you'll go on internet just fine.(I have a linksys router as well and this problem has occured to me so I know what I'm saying).
MounierNetwork
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Now maybe we're getting somewhere. Unforunately I was so frustrated that I completed deleted all avast files.
I recall that when I was deleting viruses (DOS mode) that one came up with a avast message something to the effect that it could not be moved to the vault since the hard disk did not have space (there were actually 20 Gigabytes free). I guess I should have been more suspicious, but I hit the delete option. All viruses in the system folders were moved normally to the vault. After ending the scan the networking failed immediately. This might explain the vol errors???? If this is the case there should be precautions built into avast to prevent deletion when this avast error message appears.
My ISP Verizon does not support static IPs. How can I follow your suggestion under these circumstances??
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My problem is the same as vdubmurray above. Get the same output from ipconfig /all.
Which firewall are you using?
I completed deleted all avast files.
I suppose you UNINSTALL avast and not only delete files...
My ISP Verizon does not support static IPs. How can I follow your suggestion under these circumstances??
I suppose the IP is your local IP address (the IP of the network card) and NOT your external IP (the one your ISP knows and see...).
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1. Zone alarm, but have same problem when Zone Alarm is turned off.
2. Yes I used the uninstall tool from your Website
3. Please advise how to set this up exactly. I tried a couple of different ways using the NIC card's IP but it didn't work [ need IP , subnet and DNS values to use in the IP config menu]
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1. Zone alarm, but have same problem when Zone Alarm is turned off.
It does not work, for instance, with Comodo (if blocking DNS attacks).
I mean, disabling is not enough.
Can you uninstall ZA for a while and see if the problem is corrected?
2. Yes I used the uninstall tool from your Website
But did you try uninstalling it through Control Panel before? Their website, we're users like you ;)
3. Please advise how to set this up exactly. I tried a couple of different ways using the NIC card's IP but it didn't work [ need IP , subnet and DNS values to use in the IP config menu]
The IP and the subnet could be set by yourself. Just the router and any other computer should have compatible values.
The DNS values should be informed by your ISP.
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Since I have the same router as you do perhaps I can help.
First you have to do is type in your browser 192.168.1.1, to connect to the router.
Then and type your password
Once you are on the router's main page click on the status tab
You will then see 3 DNS Adress copy the first 2.
Now go to Network connection in the control panel.
Right click on your local connection and select Properties.
There you should see Internet Protocol (TCP/IP) select that
Now click on the properties button .
A new window will open asking for your settings .
Start by choosing the option "use the following IP".
Choose any IP you want but it must start with 192 168 1
The subnet mask should be 255 255 255 0
The gateway is the IP of your router : 192 168 1 1
Then for the DNS Servers put the two IPs you copied off the router's status page.
Then You are all done.
Sure hope this helps...
Mounier Network
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Thanks for the response. The problem is more fundamental. I can not reach the router through the NIC. The brower was the first thing I tried. Ping also doesn't work with 192.168.1.1. Something is really wrong with the underlying networking software. Also tried another nic card - same result. Is there any way to repair the windows 2000 network without abandoning the whole system? [I tried the repair option on the installation disk - no help]. thanks for any help.
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Maybe you changed your router's IP ???
Also what maybe possible is that its a virus that is actually doing that and in that case its pretty bad and most hope is lost.
Sorry
MounierNetwork
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I also ran AVS today on a hard drive that was pretty full of viruses but could still connect to the internet. It found and deleted alot and I got the same "limited or no connectivity".
Anyhow, here's how I fixed it.
Go here
http://www.pchell.com/support/limitedconnectivity.shtml
and read down to where there is a link to download "WinsockXPFix.exe"
I used it and I'm back in business.