STOP 0x000000C2 BAD_POOL_CALLER - 0xC2

Kernel-mode process or driver problem.

The Stop 0xC2 message indicates that a kernel-mode process or driver incorrectly attempted to perform memory operations in the following ways:
  • By allocating a memory pool size of zero bytes
  • By allocating a memory pool that does not exist
  • By attempting to free a memory pool that is already free
  • By allocating or freeing a memory pool at an IRQL that was too high
     This Stop message is typically due to a faulty driver or software.
    


This article describes how to interpret or read Stop 0xC2 error messages in Microsoft Windows XP. The Stop 0xC2 error message indicates that a kernel-mode process or driver incorrectly tried to perform a memory operation. Typically, faulty device drivers or device software cause this error message.
    


This article describes how to debug Stop C2 error messages. Note: This is a Windows 2000 article, however it contains information that can be applied to troubleshooting the same issue in Windows XP.
    


After you upgrade to Windows XP on a computer that has an ATI Graphics RAGE FURY MAXX video adapter, your computer may stop responding, and you may receive the following error message:

STOP: 0x000000c2 A problem has been detected and Windows has been shut down to prevent damage to your computer.

BAD_POOL_CALLER


You may receive a "0x000000c1" or a "0x000000c2" Stop error message when network traffic is initiated and a filter driver is loaded. For example, this error may occur when you are using firewall software or virtual private network (VPN) software in the following situations:
  • You connect a wireless network adapter by using 802.1X authentication
  • Your firewall is using a filter driver
  • You try to use Microsoft NetMeeting over a VPN connection
    


When you upgrade your Compaq Professional Workstation AP550 computer from Microsoft Windows 2000 Professional to Windows XP, either of the following symptoms may occur...

DRIVER_UNLOADED_WITHOUT_CANCELLING_PENDING_OPERATIONS
    


When you work with a network share on a Windows XP-based computer, you may receive the following error message:

STOP: 0x000000C2 (Parameter1, Parameter2, Parameter3, Parameter4)
BAD_POOL_CALLER