MBR_CHECKSUM_MISMATCH
Code: 0x8b (139)
As HRESULT:- S: 0 (Success)
- C: 0 (Microsoft-defined)
- N: 0 (Not an NTSTATUS value)
- Facility: 0x000 (FACILITY_NULL: Default)
- Code: 0x008b (139)
- Sev: 0 (STATUS_SEVERITY_SUCCESS)
- C: 0 (Microsoft-defined)
- Facility: 0x000 (Default)
- Code: 0x008b (139)
Parameters
| Parameter | Description |
|---|---|
| 1 | The disk signature from MBR |
| 2 | The MBR checksum that the OS Loader calculates |
| 3 | The MBR checksum that the system calculates |
| 4 | Reserved |
Description
The MBR_CHECKSUM_MISMATCH bug check has a value of 0x0000008B. This bug check indicates that a mismatch has occurred in the MBR checksum.
Important
This article is for programmers. If you're a customer who has received a blue screen error code while using your computer, see Troubleshoot blue screen errors.
Cause
The MBR_CHECKSUM_MISMATCH bug check occurs during the boot process when the MBR checksum that the Microsoft Windows operating system calculates does not match the checksum that the loader passes in.
This error typically indicates a virus.
Resolution
There are many forms of viruses and not all can be detected. Typically, the newer viruses usually can be detected only by a virus scanner that has recently been upgraded. You should boot with a write-protected disk that contains a virus scanner and try to clean out the infection.
Article text from the Windows driver documentation (opens in a new tab), by Microsoft, under the CC BY 4.0 (opens in a new tab) licence.
Associated Modules
| Module | Code | Found in | Description |
|---|---|---|---|
| EventCreate.exe | 0x8b | 78.11011 | %1 |
| KernelBase.dll | 0x8b | 78.1 | The system tried to substitute a drive to a directory on a substituted drive. |
| dsreg.dll | 0x8b | 1011 | The Workstation Service logged a device registration message. Message: %1 |
| kernel32.dll | 0x8b | 78.11011 | The system tried to substitute a drive to a directory on a substituted drive. |
| nslookup.exe | 0x8b | 78.11011 | preference = %1!ld! |
| refs.sys | 0x8b | 1011 | The file system detected a global metadata corruption and was able to repair it on volume %2. Space may be leaked as part of the repair. If future mounts fail, attempting a readonly volume mount may succeed. |
| sc.exe | 0x8b | 78.11011 | CUSTOM : %1 [ETW PROVIDER UUID] |
| w32time.dll | 0x8b | 1011 | The time service has started advertising as a time source. |
| webservices.dll | 0x8b | 78.11011 | The characters '%1' are not a valid percent-encoded sequence. |
| win32k.sys | 0x8b | 78.1 | CaptionFont |
| win32kbase.sys | 0x8b | 1011 | CaptionFont |
| 11 entries | |||