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Windows - IRQL NOT LESS OR EQUAL: Blue screen

When using Windows 2000 or Windows XP, it may happen that the following error occurs, causing a blue screen:

*** STOP: 0x0000000A (0x00000011,0x0000002,0x00000001,0x80443205) 

This is caused when a driver or process try to access a protected memory area.
The error may be due to faulty memory cards or a new device installed incorrectly.

In such cases it is advisable, where possible, to temporarily disable the latest hardware added, and gradually re-install the latest drivers for each device.

It is also advisable to test your memory modules (RAM).

Problem related to NVIDIA cards

This problem occurs because your computer has an Nvidia video card using the Nv4.sys video driver.

To check if your system uses one of these drivers, follow these steps:
  • 1. Open Device Manager.
  • 2. Under the graphic car icon, select the graphics, click with right button, then click Properties.
  • 3. Under the Driver tab, click the Driver Details button to display the names of the drivers.
  • 4. If multiple video adapters are installed, repeat these steps for each of them.
  • To resolve this problem, update the driver for your video card:

  • Microsoft provides third-party contact information to help you find technical support. This information may change without notice. Microsoft does not guarantee the accuracy of this third-party information.

Work around

To circumvent this problem, proceed as follows:
  • 1. Click Start, click Control Panel, then double-click Display.
  • 2. On the Settings tab, click Advanced, then click the Troubleshooting tab.
  • 3. Move the Hardware Acceleration slider to None, then uncheck the box Enable Write Combining.
  • 4. Click OK twice.

Note: This procedure prevents the display driver from programming the hardware incorrectly, but it causes the loss of some features and video performance.

A few words of thanks would be greatly appreciated.

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