running Windows XP getting C000021A (fatal system error) 0X C0000006 (0X7C921515 0X0053F1C4)any ideas on how to fix it?just prior to the error message i am getting a "parameter error" that quickly vanishes1 person needs an answerI do too

Hi,1. How long have you been facing this issue?2. Did you make any recent hardware or software changes on your computer prior to this issue?3. When exactly do you get this error message?This issue might occur because of new or updated device driver, system service, or third-party application. Let’s try the below steps and check.Step 1: Perform clean boot on the computer.Starting your computer by using a minimal set of drivers and startup programs so that you can determine whether a background program is interfering with your game or program. This kind of startup is known as a "Clean boot."Follow the steps provide in the below article to perform clean boot. http://support.microsoft.com/kb/310353Step 2: Perform disk error check.Refer:http://support.microsoft.com/kb/315265http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/chkdsk.mspx?mfr=trueStep 3: You may also try performing a hardware clean boot and check if the issue is caused due to any of the hardware connected to the computer.For doing hardware clean boot following the below steps:a. Unplug all the external Devices.b. Start the System in Safe mode. c. Go toDevice manager. Device that can be disabled for doing a Hardware clean boot are • Video Cards.• Sound Card. • Network Card. • USB Devices and controller (Please don’t do this if you are using USB Keyboard or Mouse or Wireless Keyboard or mouse.)• CD\DVD. • Modems.• Ports (serial and parallel)After doing this if the issue doesn’t then, try to enable the device one by one and check out which device is causing the issue .Try to install the latest driver for that device or contact the hardware vendor.Refer:http://support.microsoft.com/kb/316434http://support.microsoft.com/kb/283658http://www.microsoft.com/windowsxp/using/helpandsupport/learnmore/finddrivers.mspxhttp://support.microsoft.com/kb/319908You may also have a look at the below articles which might help you.How to troubleshoot a "STOP 0xC000021A" errorhttp://support.microsoft.com/kb/156669How to start your computer by using the Last Known Good Configuration feature in Windows XPhttp://support.microsoft.com/kb/307852How to restore Windows XP to a previous statehttp://support.microsoft.com/kb/306084Thanks and Regards Umesh P - 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.]