Log files that are created when you upgrade to a new version of Windows

INTRODUCTION
This article lists all the log files that are created when you upgrade from an earlier version of Windows.
More information
The following log files are created when an upgrade is successful:
  • C:\Windows\Panther\Setupact.log
  • C:\Windows\panther\setuperr.log
  • C:\Windows\inf\setupapi.app.log
  • C:\Windows\inf\setupapi.dev.log
  • C:\Windows\panther\PreGatherPnPList.log
  • C:\Windows\panther\PostApplyPnPList.log
  • C:\Windows\panther\miglog.xml
The following log files are created when an upgrade fails during installation before the computer restarts for the second time:
  • C:\$Windows.~BT\Sources\panther\setupact.log
  • C:\$Windows.~BT\Sources\panther\miglog.xml
  • C:\Windows\setupapi.log
  • [Windows 10:] C:\Windows\Logs\MoSetup\BlueBox.log
The following log files are created when an upgrade fails during installation after the computer restarts for the second time:
  • C:\Windows\panther\setupact.log
  • C:\Windows\panther\miglog.xml
  • C:\Windows\inf\setupapi.app.log
  • C:\Windows\inf\setupapi.dev.log
  • C:\Windows\panther\PreGatherPnPList.log
  • C:\Windows\panther\PostApplyPnPList.log
  • C:\Windows\memory.dmp
The following log files are created when an upgrade fails, and then you restore the desktop:
  • C:\$Windows.~BT\Sources\panther\setupact.log
  • C:\$Windows.~BT\Sources\panther\miglog.xml
  • C:\$Windows.~BT\sources\panther\setupapi\setupapi.dev.log
  • C:\$Windows.~BT\sources\panther\setupapi\setupapi.app.log
  • C:\Windows\memory.dmp
The following log files are created when an upgrade fails, and the installation rollback is initiated:
  • C:\$Windows.~BT\Sources\Rollback\setupact.log
  • C:\$Windows.~BT\Sources\Rollback\setupact.err
Properties

Article ID: 928901 - Last Review: 04/25/2016 23:10:00 - Revision: 3.1

Windows 10 Enterprise 2015 LTSB, Windows 10 Version 1511, Windows 10, Windows Vista Enterprise 64-bit Edition, Windows Vista Home Basic 64-bit Edition, Windows Vista Home Premium 64-bit Edition, Windows Vista Ultimate 64-bit Edition, Windows Vista Business, Windows Vista Business 64-bit Edition, Windows Vista Enterprise, Windows Vista Home Basic, Windows Vista Home Premium, Windows Vista Starter, Windows Vista Ultimate, Windows 8.1, Windows 8.1 Enterprise

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