Windows 10 upgrade error codes

Applies to:   Windows 10

If the upgrade process isn't successful, Windows Setup will return two codes:

1. A result code: The result code corresponds to a specific Win32 or NTSTATUS error.
2. An extend code: The extend code contains information about both the phase in which an error occurred, and the operation that was being performed when the error occurred.

For example, a result code of 0xC1900101 with an extend code of 0x4000D will be returned as: 0xC1900101 - 0x4000D.

Result codes

A result code of 0xC1900101 is generic and indicates that a rollback occurred. In most cases, the cause is a driver compatibility issue. To troubleshoot a failed upgrade that has returned a result code of 0xC1900101, analyze the extend code to determine the Windows Setup phase, and see the Resolution procedures section later in this article.

The following set of result codes is associated with Windows Setup compatibility warnings:

A list of modern setup (mosetup) errors with descriptions in the range is available in the Resolution procedures section in this article.

Other result codes can be matched to the specific type of error encountered. To match a result code to an error:

1. Identify the error code type as either Win32 or NTSTATUS using the first hexadecimal digit:

   8 = Win32 error code (ex: 0x80070070)
   C = NTSTATUS value (ex: 0xC1900107)

2. Write down the last four digits of the error code (ex: 0x80070070 = 0070). These digits are the actual error code type as defined in the HRESULT or the NTSTATUS structure. Other digits in the code identify things such as the device type that produced the error.

3. Based on the type of error code determined in the first step (Win32 or NTSTATUS), match the four digits derived from the second step to either a Win32 error code or NTSTATUS value using the following links:

   • Win32 error code
   • NTSTATUS value

Examples:

• 0x80070070
  1. Based on the "8", this is a Win32 error code.
  2. The last four digits are 0070, so look up 0x00000070 in the Win32 error code table.
  3. The error is:

     ERROR_DISK_FULL

• 0xC1900107
  1. Based on the "C", this is an NTSTATUS error code.
  2. The last four digits are 0107, so look up 0x00000107 in the NTSTATUS value table.
  3. The error is:

     STATUS_SOME_NOT_MAPPED

Some result codes are self-explanatory, whereas others are more generic and require further analysis. In the examples shown above, ERROR_DISK_FULL indicates that the hard drive is full and extra room is needed to complete Windows upgrade. The message STATUS_SOME_NOT_MAPPED is more ambiguous, and means that an action is pending. In this case, the action pending is often the cleanup operation from a previous installation attempt, which can be resolved with a system reboot.

Extend codes

Extend codes can be matched to the phase and operation when an error occurred. To match an extend code to the phase and operation:

1. Use the first digit to identify the phase (ex: 0x4000D = 4).
2. Use the last two digits to identify the operation (ex: 0x4000D = 0D).
3. Match the phase and operation to values in the tables provided below.

The following tables provide the corresponding phase and operation for values of an extend code:

Extend code: phase

Extend code: operation

For example: An extend code of 0x4000D, represents a problem during phase 4 (0x4) with data migration (000D).

Data collection

If you need assistance from Microsoft support, we recommend you collect the information by following the steps mentioned in Gather information by using TSS for deployment-related issues.

More information

• Windows 10 FAQ for IT professionals
• Windows 10 Enterprise system requirements
• Windows 10 Specifications
• Microsoft Windows Q & A
• Fix Windows Update errors by using the DISM or System Update Readiness tool