This started this 3 days ago. When i restart or shut down the computer, a system window pops up saying 3D9Dwindow is not respondingand windows cannot shutdown. if you choose to end this program now it will loose all unsaved data, and may cause windows to becomeunstable next time you run windows. or you can wait to see if this program will start responding.. The first time i seen this i let it sit to seeif it would start responding, but it didn't after 30 minutes i clicked end program now. when i did it opened another system window sayingfor me to tell microsoft about this program error, so i did then windows shut down after it sent the info. After that first time my computerhas started hanging up or running real slow. and when i try to browse the internet i can't type anything in the address bar. i mean i canbut one letter at a time, and a 30 to 1 minute pause between each letter. Its very aggravating. I get this not responding every time ishut down, or restart my computer. So what is this D3D9 window? and how to i stop it from causing so much trouble with my computer? Thanks1 person needs an answerI do too

Hi, 1. Did you make any changes to the computer recently?This file is associated with Direct X. I would ask you to uninstall the currently installed direct X and then re-install the latest version and check.Registry Disclaimer:Important this section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:How to back up and restore the registry in Windows: http://support.microsoft.com/kb/322756Step 1.a. To do this click start and type regedit in the run and press enter.Next, navigate to the following registry key.HKEY_LOCAL_MACHINE\Software\Microsoft\DirectXb. Here, delete the DirectX folder, exit the Registry Editor, and restart your XP computer.Step 2.Go to the link below and run the installer and follow the instructions on screen to install the latest direct X.DirectX End-User Runtime Web Installer http://www.microsoft.com/downloads/en/details.aspx?FamilyID=2da43d38-db71-4c1b-bc6a-9b6652cd92a3&displaylang=enHow to Download and Install DirectXhttp://support.microsoft.com/kb/179113Hope this helps.Thanks and Regards:Shekhar S - Microsoft Support. Visit our Microsoft Answers Feedback Forum and let us know what you think. If this post helps to resolve your issue, please click the "Mark as Answer" or "Helpful" button at the top of this message. By marking a post as Answered, or Helpful you help others find the answer faster.