Bug Check 0x9C: MACHINE_CHECK_EXCEPTION
The MACHINE_CHECK_EXCEPTION bug check has a value of 0x0000009C. This bug check indicates that a fatal machine check exception has occurred.
Important Info If You Have Received a STOP Code
If you received a blue screen error, or stop code, the computer has shut down abruptly to protect itself from data loss. A hardware device, its driver, or related software might have caused this error. If your copy of Windows came with your computer, call the manufacturer of your computer. If you purchased Windows separately from your computer, Microsoft provides support. To find contact info for Microsoft or your computer manufacturer, Contact Support.
If you have experience with computers and want to try to recover from this error, follow the steps provided in the Microsoft article Resolving STOP (Blue Screen) Errors in Windows.
These actions might prevent an error like this from happening again:
- Download and install updates and device drivers for your computer from Windows Update.
- Scan your computer for computer viruses.
- Check your hard disk for errors.
MACHINE_CHECK_EXCEPTION Parameters
The four parameters that are listed in the message have different meanings, depending on the processor type.
If the processor is based on an older x86-based architecture and has the Machine Check Exception (MCE) feature but not the Machine Check Architecture (MCA) feature (for example, the Intel Pentium processor), the parameters have the following meaning.
| Parameter | Description |
|---|---|
|
1 |
The low 32 bits of P5_MC_TYPE Machine Service Report (MSR) |
|
2 |
The address of the MCA_EXCEPTION structure |
|
3 |
The high 32 bits of P5_MC_ADDR MSR |
|
4 |
The low 32 bits of P5_MC_ADDR MSR |
If the processor is based on a newer x86-based architecture and has the MCA feature and the MCE feature (for example, any Intel Processor of family 6 or higher, such as Pentium Pro, Pentium IV, or Xeon), or if the processor is an x64-based processor, the parameters have the following meaning.
| Parameter | Description |
|---|---|
|
1 |
The bank number |
|
2 |
The address of the MCA_EXCEPTION structure |
|
3 |
The high 32 bits of MCi_STATUS MSR for the MCA bank that had the error |
|
4 |
The low 32 bits of MCi_STATUS MSR for the MCA bank that had the error |
On an Itanium-based processor, the parameters have the following meaning.
Note Parameter 1 indicates the type of violation.
| Parameter 1 | Parameter 2 | Parameter 3 | Parameter 4 | Cause |
|---|---|---|---|---|
|
0x1 |
The address of the log |
The size of the log |
0 | |
|
0x2 |
The address of the log |
The size of the log |
The error code |
The system abstraction layer (SAL) returned an error for SAL_GET_STATEINFO while processing MCA. |
|
0x3 |
The address of the log |
The size of the log |
The error code |
SAL returned an error for SAL_CLEAR_STATEINFO while it processed MCA. |
|
0x4 |
The address of the log |
The size of the log |
0 |
Firmware (FW) reported a fatal MCA. |
|
0x5 |
The address of the log |
The size of the log |
0 |
There are two possible causes:
|
|
0xB |
The address of the log |
The size of the log |
0 | |
|
0xC |
The address of the log |
The size of the log |
The error code |
SAL returned an error for SAL_GET_STATEINFO while processing an INIT event. |
|
0xD |
The address of the log |
The size of the log |
The error code |
SAL returned an error for SAL_CLEAR_STATEINFO while it processed an INIT event. |
|
0xE |
The address of the log |
The size of the log |
0 |
Remarks
In Windows Vista and later operating systems, this bug check occurs only in the following circumstances.
- WHEA is not fully initialized.
- All processors that rendezvous have no errors in their registers.
For other circumstances, this bug check has been replaced with bug Check 0x124: WHEA_UNCORRECTABLE_ERROR in Windows Vista and later operating systems.
For more information about Machine Check Architecture (MCA), see the Intel or AMD Web sites.
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Build date: 4/9/2013
