LAN/Ethernet and wireless: can connect to networks, but shows "no Internet access.

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  Many details above.  I am looking for no idea regarding: (a) what could happen here, (b) how the network problem cards make installable again to get rid of them, (c) any other thing that might apply.

  Thank you.

  =======================

  November 5, 2009

  Problem solved.  Here's how.

  The blackout "Network Interface Cards" were virtual devices, created by the Virus.

  Steps, I made before the previous post (above):
  (1) unplug the machine infected of all access to the internet.
  (2) on another computer, I went to http://www.free-av.com/, click on the download tab and under "Free tools" at the bottom, chosen Avira AntiVir Rescue System.  Then I downloaded it, run, and it burned a bootable "rescue CD".
  (3) has taken the CD for infected people kicked and machine from him.  If you cannot open your CD with power off, another way is to start the system, insert the CD, then restart the system.  Pay attention to all messages early in the boot process before Windows loads.  Depending on your system configuration, you may need to change the boot sequence so that the CD drive is checked before the hard drive.  It's usually pretty easy to do, once you pressed the right key during startup to indicate you want to take control of this small point.
  (4) I forgot the exact option here once the CD boot system, but select that you want to run the virus scan.  It took about 2 hours on my laptop.  The initial default is report results only; I suggest to change that to rename infected files (which will add an XXX at the end of any "infected" file).  The analysis is quite complete, but can be overagressive at times.  It is not a complete scan, given that the big Compact files assessed completely.  Recording on paper for future reference: all of the alerts that were generated, the path and name of the file and the reason for the alert.  Some will probably be partial matches to the viral bosses identified as 'contains a model of detection' (a partial match suspicious), rather than 'contains the threat XYZ' (which means that all paired for identification).  Some of the files "suspicious" may be essential to the operation of your system and you want to UN-rename them back to their original name.  If in doubt, check with someone who knows the PCs.
  (5) now you should have a system contains it a neutralized virus to work for removal.  That's where I was when I filed the report.  My major issue remaining before cleaning the pieces of virus, which was now there is no internet access, no cable, no wireless on the infected system.

  OK, so what next?  My infection cause a virus named ndisvvan.sys driver.  If you also have this bad actor, then you may want to read in detail.  If not, then the following may, or do not apply to your case.

  (6) first, in Windows Explorer (let us remember that we are in Win XP), click on tools, then Folder Options... and select the view tab.  Go to the bottom of the list and select "Show the hidden files and folders" and uncheck "hide the file Extensions known Types.  We will need to go into the hidden folders and know exactly the type of file that we deal with.  I guess it goes without saying that yu has to be a system administrator for what to do next.  Win Vista it makes it much more difficult, since sometimes the administrator has no access to all the files that have been installed by a different administrator ID.  It must mess with you give permission, or appropriate, the files you need to access.  I suggest to make a new folder ("VirusParts") to store all the files that you find on the virus, until you are ready to delete them forever.
  (7) first of all, open the file C:\Windows\system32\drivers\etc\HOSTS (now called HOSTSXXX) and move this file to your VirusParts folder.  This part of your internet access is now unlocked.
  (8) then go to C:\WINDOWS\inf, and browse for the files netsf.inf, netsf. PNF, netsf_m.inf and netsf_m.PNF.  These are the files that most likely loading drivers virus in your system.  Having a peek inside .inf files can help you identify some of the changes made by the virus to your registry.  The virus probably also created a new service on your machine.  In my case, the service was named Passthru, and device to implement ms_passthrump (Microsoft Passthru Miniport).  These names are actually from a document from Microsoft that explains how to develop programs of virtual device to filter the data goes or network devices.  If these are directly related to your virus, the program driver specified inside them will be none other than our ndisvvan.sys enemy.  Research in .inf files (these are files text; the.) The PNF files are binary, not text) can help identify the service or services that the virus added to your system, which are now (essentially) a part of the operating system that starts automatically with Windows.  Since there is no virus in the .inf or the. The PNF files, they will not be detected by an antivirus.  All .inf files sort in order of the date and time of creation.  Suspect not with a close date of one of the files netsf.inf and netsf_m.inf.  Windows compile .inf files in the. PNF files, which can occur a few days later, when windows moves to this task.  If you find these files, move them to your VirusParts folder where they can not be recharged.
  (9) to start the Panel (from the start menu), double-click 'System', then select the Hardware tab, then click the Device Manager button.  Expand the category of Network Interfaces, and some of them should have an exclamation point in a yellow circle showing.  If you right-click on each one and select Properties, you should see an error 39 (driver not found; the antivirus program renamed their ndisvvan.sys file).  If you click on the other tabs in the properties, you can find the device is something like ROOT\MS_PASSTHRUMP\0000.  Now, you know that you are very likely to something.  I had three devices affected with numbers 0000, 0001 and 0002.  Carefully note the names of the Network Interfaces.  Two of my friends were identical to the names of other Interfaces of network but with "»" added.  The interface of third-party network with a problem was named 'Miniport network EXPANDED (IP) -'.  But there is no corresponding legitimate network interface of the same name.  Common Council to recharge a bad driver is uninstall, no new hardware detection and let windows reload from .inf file specifications.  However, if you try to uninstall these interfaces (those with here in exclamation points) Windows tells you that they can't be uninstalled and "perhaps it is used to start" or other similar term.
  (10) this part is a bit tricky.  Ask someone who knows how to work with the Windows registry, if you're not on this topic.  Mistakes here can have disastrous results.  Enough said?  If you search the registry for "passthru", you will get several matches, mostly related in one way or another for the virus and his new 'service '.
  Under a path like HKEY_USER_MACHINE\CurrentControlSet\Enum\Root\MS_PASSTHRUMP\0000, you will find information as the name of the interface (make sure it matches the name that you noted earlier) and manages a definition of tha of the pilot program.  For example {4D36E972-E325-11CE-BFC1-08002BE10318} \0014.  Do the same for MS_PASSTHRUMP\0001 (probably {... (10318} \0015) and \0002 (probably {... (10318} \0016).  The string of numbers and letters within the {...} identifies a particular program for windows, and the \0014 a particular use of the program {... 10318} is actually a standard part of windows and not a part of the virus.  However, uses \0014 \0015 and \0016 of this program have probably added by the virus.  Save the links: MS_PASSTHRUMP\0000 related to {... 10318} \0014.  Now, go to HKEY_LOCAL_MACHINE\CurrentControlSet\Class and you will find a long list of class programs identified by their number {...}.  I suggest from the end of the list and the expansion of each occurrence of our {... 10318} in the list, one by one.  If you select the subitems in the extension of this list, each device has a name.  You are looking for Netwrok Interface devices.  Under the instance of our {... network interface devices 10318} it will be to the less 0014 points and probably at least 0016 (based on the links that we just recorded). 0014 resembled a legitimate wireless LAN interface, so I don't mess with this definition.  However 0015 and 0016 looked like they have been added by the virus.  Inside of each specification, you will find a key named "characteristic".  Its value is what prevents us from uninstall the network interface in the Device Manager.  Its value is a hexadecimal value that integrates several indicators for Windows.  In particular, the value 0 x 20 is the bit that specifies that the device cannot be uninstalled by the user, and 0x08 tells windows ' hide ' this device of the user.  Almost all of my devices had characteristics codes 0 x 29, including those created by the virus.  (I don't know; others might have been modified by the virus, but that seems a bit unlikely).  In any case, for the interfaces added by the virus, network we need to change their characteristic values of 0 x 29 something like 0 x 1 (you can also display the device).  Note that changing the characteristic value is a reversible operation that is likely to harm anything in the system.  We can always go back and change it back to 0 x 29, if we have not uninstalled the device.  In my case, I put the characteristics values on 0 x 1 for 0015-0016 devices, which looked like, they were added by the virus.  I did this in the CurrentControlSet control set and for good measure repeated it in ControlSet001 and ControlSet002 registry.  (Windows retains backups of critical information in the registry, in the different ControlSets and creates the CurrentControlSet Control at the system startup set.)
  (11) now return the Control Panel, then system, then the Hardware tab and then the Device Manager button.  Now you should be able to uninstall the network with exclamation points interfaces in the yellow circles, those we checked earlier was connected to the ndisvvan.sys driver of virus, using the MS_PASSTHRUMP interfaces for Passthru Windows service.  Since it's virtual devices, and we removed their .inf and. The PNF files, they're not coming after we uninstall them.
  (12) now, we have removed the network interface drivers that are added by the virus, but legitimate real pilots are not connected in the system correctly, so our internet connection still does not work.  We need to re - install the drivers of legitimate network interface.  To do this, in the device, right-click Manager and uninstall the device controller network legitimate.  On my HP laptop, it was named "nVidia nForce Network Controller".  After uninstallation, in the window menu in Device Manager, click Actions, and then select "Scan for hardware changes".  Windows should report that she has found a new network interface device and that it is set up, and in a minute or two, it is ready for use.  At this point, on my system, both the wired ethernet port and wireless LAN bustled again.

  I still have to go around cleaning the files renamed by the antivirus program and get them out of the PC, but at least the PC is now working without virus.  The virus may also have damaged the process of restoration of the system, which still fails to restore the previous system configuration.  (Windows Explorer always creates an exception address on reboot).  I still need to work on this problem.  The virus 'off' system restore for all drives by using a parameter, however the TWEAKUI tool (I think it was what I used) allowed me to override this setting and control of group policy.

  There are a lot of viruses out there who adopts this method to take control of low level of connections from the PC to the internet, while allowing to download more viruses and keyloggers in the future in respect of the remote control.  Some of these viruses attach also to the many many files the user program.  In this case it has little alternative except to wipe the drive and start over with a clean, install since often these files cannot be cleaned.  Fortunately, my infection was not serious, and it was possible to remove the virus as described above.  I hope this description helps somebody out there.

  This answer is just a formality to change the resolved state.

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