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Stop error message: "DRIVER_IRQL_NOT_LESS_OR_EQUAL" or "USER_MODE_HEALTH_MONITOR"

  • Article

This article helps to fix the error "DRIVER_IRQL_NOT_LESS_OR_EQUAL" or "USER_MODE_HEALTH_MONITOR".

Applies to:   Windows Server 2012 R2
Original KB number:   2863960

Symptoms

On a Windows Server 2012-based computer, you receive a Stop error message that is similar to one of the following:

Your PC ran into a problem and needs to restart. We're just colleting some error info, and then we'll restart for you. (0% complete) If you would like to know more, you can search online later for this error: DRIVER_IRQL_NOT_LESS_OR_EQUAL

Or

Your PC ran into a problem and needs to restart. We're just colleting some error info, and then we'll restart for you. (0% complete) If you would like to know more, you can search online later for this error: USER_MODE_HEALTH_MONITOR

Note

Not all "DRIVER_IRQL_NOT_LESS_OR_EQUAL" and "USER_MODE_HEALTH_MONITOR" errors are caused by this issue.

Cause

This problem occurs with HP Smart Array SCSI or SAS/SATA Controllers driver HpCISSS2 driver version 62.26.0.64.

Resolution

To resolve this problem, you need to downgrade the HPCISSS2 driver to 62.24.2.64.

More information

This blue screen error occurs because of a portion of the Smart Array firmware that deals with 64-bit command submissions. HP Windows Server 2012 HPCISSS2.SYS driver Version 62.26.0.64 exposes this error condition because it is the first driver to enable 64-bit command addressing feature support.