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

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