Windows setup log files are in different locations on the hard disk. These locations depend on the setup phase. The Panther folder is one such, where you will get installation, setup, or upgrade log files.
What is the Panther folder?
The Panther folder contains all the installation and setup log files for Windows 10. All the logs that were created during the installation of the operating system can be found there.
The folder may be located at different locations depending on the setup phase:
Down-level phase
C:$WINDOWS.~BT\Sources\Panther
Windows Preinstallation Environment phase
X:$WINDOWS.~BT\Sources\Panther
Online configuration phase or first boot phase
C:\WINDOWS\PANTHER
Windows Welcome phase
C:\WINDOWS\PANTHER
Rollback phase
C:$WINDOWS.~BT\Sources\Panther
These log files can be most useful for troubleshooting each setup phase of Windows 10 installation. Renaming or Deleting then has no negative effects.
If you performed an upgrade installation of Windows the Panther folder size can be in GBs.
In some Windows versions, the name of the folder is in the color blue, then it means it is encrypted or compressed.
If you are sure that the installation has gone well, then you are free to delete the Panther folder.
Information about some other Windows folders:
$SysReset folder | $Windows.~BT & $Windows.~WS folders | $WinREAgent folder | WinSxS folder | REMPL folder | ProgramData folder | System32 and SysWOW64 folders | Sysnative folder | Catroot & Catroot2 folders.

- Tags: Folder