Log files created when you upgrade to Windows 10

[HappyAndyK]

Here is a list of Log files that are created when you upgrade to a new version of Windows.

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

Source.

[nazim13]

Does anyone know if a dump file gets created when that happens and where it might be stored? i poked around the $Windows.~BT folder and C:\Windows\ but couldn't find it.Also, could someone list the different phases of the upgrade process and where the log files are located for each phase?

[viydudomla]

Anyway to restore them in case anyone mismatch or let's say delete it!

With Regards,
Viydu Domla

[lamurni]

Logs are created as records, it something goes wrong, we can easily find what might be the reason behind failure.. I never checked these logs :P