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Slow Pc?


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#1 DyingRose

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Posted 21 January 2008 - 11:11 PM

Hi all, (someone posted on the other topic I posted in another section.. to post it here.... sorry for posting this twice)

I've searched and searched for information about this.... yesterday, my computer started being slow and before windows even loaded, it said something about a backdoor being open and to close it... something like A:/ door... I'm assuming that was my floppy D. then I installed my virus scanner and it deleted viruses... now it isnt saying it anymore... but now it's saying.

Windows cannot find c:/ drivers/ntndis.exe make sure you typed the name correctly, and then try again. To search for a file, click the start button and then click search.....

Does anyone know what file this is that I seem to need?

Thanks alot
DR

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#2 Tomo2

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Posted 22 January 2008 - 02:29 AM

In most cases there shouldn't be a folder called "Drivers" In the root of your hard drive. Sounds like the viri are still there. What antivirus are you using?
Try running an online scan: Trend Micro Housecall
Slow Computer? Check this troubleshooting checklist.

Edited by Tomo2, 22 January 2008 - 02:31 AM.

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#3 quietman7

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Posted 22 January 2008 - 09:45 AM

ntndis.exe is related to W32/Rbot-DPG worm and IRC backdoor but its normally located at C:\WINDOWS\system32\drivers.

The "Cannot find...", "Could not run..." or "Error loading..." message is usually related to a program (or malware) that was set to run at startup but has been deleted. Windows is trying to load this file but cannot locate it since the file was mostly likely removed during an anti-virus or anti-malware scan or the uninstall of a program. However, an associated orphaned registry entry remains and is telling Windows to load the file when you boot up. You need to remove this registry entry so Windows stops searching for the file when it loads.

To resolve this, download Autoruns, search for the related entry and then delete it.
  • Create a new folder on your hard drive called AutoRuns (C:\AutoRuns) and extract (unzip) the file there. (click here if your not sure how to do this.)
  • Open the folder and double-click on autoruns.exe to launch it.
  • Please be patient as it scans and populates the entries.
  • When done scanning, it will say Ready at the bottom.
  • Scroll through the list and look for a startup entry related to the file(s) in the error message.
  • Right-click on the entry and choose delete.
  • Reboot your computer and see if the startup error returns.
Backdoor Trojans, IRCBots and Infostealers are very dangerous because they provide a means of accessing a computer system that bypasses security mechanisms and steal sensitive information like passwords, personal and financial data which they send back to the hacker. Remote attackers use backdoor Trojans as part of an exploit to to gain unauthorized access to a computer and take control of it without your knowledge. Read the Danger: Remote Access Trojans.

If your computer was used for online banking, has credit card information or other sensitive data on it, all passwords should be changed immediately to include those used for banking, email, eBay, paypal and online forums. You should consider them to be compromised. They should be changed by using a different computer and not the infected one. If not, an attacker may get the new passwords and transaction information. Banking and credit card institutions should be notified of the possible security breach.

Although the backdoor Trojan was identified and removed, your PC has likely been compromised and there is no way to be sure the computer can ever be trusted again. It is dangerous and incorrect to assume that because the backdoor Trojan has been removed the computer is now secure. Many experts in the security community believe that once infected with this type of malware, the best course of action is to reformat and reinstall the OS. Please read "When should I re-format?".
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