BSOD tcpip.sys driver_irql_not_less_or_equal

Игорь Сухомлинов asked on
hi! i'm experiencing bsods 2-3 times a day with the same error: driver_irql_not_less_or_equal (tcpip.sys)
dumps are available on
could anyone assist on solving this issue?
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Patrick Barker replied on

We have a fair amount of DRIVER_IRQL_NOT_LESS_OR_EQUAL (d1) bug checks.

This indicates that a kernel-mode driver attempted to access pageable memory at a process IRQL that was too high.

A driver tried to access an address that is pageable (or that is completely invalid) while the IRQL was too high. This bug check is usually caused by drivers that have used improper addresses.

By default, the fault of the crash is tcpip,sys which is the Microsoft TCP/IP Driver (networking related). This is not the true cause of the crash, and usually when we have network related crashes like this, it's caused by one of two things:

1. Network drivers themselves need to be updated.

2. 3rd party antivirus or firewall software causing NETBIOS conflicts.


Remove and replace Kaspersky with Windows 8's built-in Windows Defender for temporary troubleshooting purposes:

Kaspersky removal -

Windows Defender (how to turn on after removal) -


Debugger/Reverse Engineer.
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