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When I try to open some of my programs and applications I get a blank window with (C:WINDOWSSystem32rundll32.exe) in the header. Another small window opens inside the other window with. (16 bit MS-DOS Subsystem) in the header with the error message. The NTVDM CPU has encountered an illegal instruction. cs: 0dad IP:0195 OP:63 d7 3b 6c ee choose “close” to terminate the application. The first set of #’s and letters, “0dad” change, 0db6 is one of the other series of #’s and letters that has appeared. I have tried buying RegCure to help fix it and I already had Bit Defender 2009 installed. I have also lost my whole E: drive is now missing and I am in severe need of memory, system restore is inoperable now but I tried it when it was working and it did not fix the problem. I’m not sure when I started having problems, but I think it was around when I installed the update 3.0,3.1, service pack, but I can’t get into Add and Remove Programs. When I open system info, I get a blank screen. Please help. I’m worried about my hard drive and its data.NTVDM CPU Error, rundll error, illegal operation

I know that Kate addressed this question in her answer to the post on July 13^th. Did you try Windows System Configuration or to repair Windows and those didn’t work for you? If you haven’t tried them, my first suggestion would be to go back and follow the step-by-step instructions to see if that solves your problem.

DLL Errors

DLL files are small files that are part of the operating system of a Windows computer. They provide a function for a specific operation for several programs. There are ways to get rid of DLL errors manually, but because this can seriously damage your computer if done incorrectly, I never give directions for removing them yourself. I’m surprised that RegCure didn’t work for you - if you didn’t have success with the program then I doubt that a tech will be able to do it manually.

NTVDM.EXE Error

The ntvdm.exe is another matter. This happens when you are trying to run a 16-bit program in a 32-bit environment. Have you installed anything new lately that you can easily remove? It can also be caused by malware, which can be a problem if you can’t access your antivirus programs.

We don’t offer direct support here, but we do recommend an online support company which you might want to try before you resort to reinstalling your operating system.

Hard Drive Data 

If all else fails, you should still be able to get the data off of your hard drive - even though you are experiencing several different problems, hard drive problems don’t appear to be one of them. If you don’t have your data backed up, you can still pull the hard drive and copy it over either as a slave in another PC or by using an enclosure. Once you have your data copied, you can load your Windows CD and choose to install a fresh version of your operating system. Be aware that if you suspect that the cause is malware, anything you back up may be infected, so it might be wise to back up the bare minimum that you need and make sure you run a good antimalware program right after you install the new operating system.

Try some of the suggestions and see if you can get your system up and running. If that doesn’t work, you may want to get some technical help to back up your hard drive and reinstall Windows.

I receive this error when I restart my computer: RUNDLL, CTMBHA.DLL. What is it and what do I need to do?

What are RUNDLL errors?

RUNDLL errors can occur for any number of reasons. Typically, spyware, a virus, faulty application installations, incomplete uninstallations, faulty software, and drive errors can all account for creating RUNDLL errors.

Error Message: RUNDLL, CTMBHA.DLL

If you are receiving the above message, RUNDLL, CTMBHA.DLL, then unfortunately, you have a form of malware on your computer. You will need to complete a repair install of your operating system, run anti-virus software, and reinstall the updates for your operating system.

Free Download - Fixes Rundll Error in 2 minutes!

Why Complete a Repair Install

In order to repair the files that have been damaged by the virus, you need to complete a repair install of your operating system. This will allow your computer to function properly as long as you also go about the business of removing the virus.

How to Complete a Repair Install in XP

If your operating system is Windows XP, you can visit the following link to see detailed instructions on completing a repair installation: Repair Install for Windows XP. It is important to note that several sets of instructions are included to allow for different scenarios. The instructions at the top pertain to a system that also includes Internet Explorer 7. Additionally, instructions for repairing Windows XP Service Pack 2 or SP2, Windows XP Service Pack 3 or SP3, and for Windows XP without either Service Pack are included. At the bottom of the screen, you will also find directions on how to reinstall Internet Explorer 7 should you have needed to uninstall it.

How to Complete a Repair Install in Vista

Free Download - Fixes Rundll Error in 2 minutes!

As long as you have your Vista DVD, you can perform a repair install. Follow these directions:

• Insert the DVD into your computer.
• Start the installation.
• Enter the product key into the box when prompted.
• Most likely, the installer will be able to identify that a problem exists and you can select the original Vista installation.
• Select upgrade, which will complete the repair installation.

How to Scan for Malware

In order to rid yourself of the problem that initiated all of this trouble, you need to run a reliable anti-spyware/anti-virus application. One such reliable program is ParetoLogic Anti-Virus Plus, which you can obtain from here: Anti-VirusPlus. This application will also remove other forms of malware that are on your computer, if any, including spyware, adware, Trojans, and viruses.