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Icacls C:\$Windows.~BT\*.* /T /grant administrators:F In an elevated command prompt, run the following commands. The folder is hidden, so first, you need to enable viewing the hidden folders to. Since the folder in question is typically removed on its own, you can safely delete it. bt is a temporary hidden folder as a part of Windows Upgrade.
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There would indeed be a log file that contains the reason, although the provided reason will likely be not clear, to such a degree that Microsoft has a tool to decode the reason for the failure. likely contains the files to perform the upgrade. I can conclude that your system attempted and failed to upgrade to Windows 10 version 1809 on August 28th, 2019. Resolve Windows 10 upgrade errors contains a link to a tool that will help you diagnose the failure contained within. echo 'This will delete the folder C:Windows.WS and C:Windows.BT. Do not run the batch file as an administrator. Double-click Delete WindowsWS and WindowsBT.bat to delete the folders. Delete Windows.BT and Windows.WS Folders is a batch file to simplify deleting these two folders that appear as hidden folders after a Windows Update. The folder contains a log file, if the upgrade to 1903 is indeed failing, the log would contain the reason. Copy and paste the following lines into Notepad and save as Delete WindowsWS and WindowsBT.bat.
DELETE $WINDOWS. BT INSTALL
The second is that your system has been trying to install 1903 but failing to do so. There two possibilities, the first is that this folder isn't all that new, and contains the temporary files from the upgrade to 1809. The folder is used as a temporary storage location when a feature upgrade is installed, but there is supposed to be an option in the Disk Cleanup utility that will delete the folder. Successfully Tested On: Windows 8 Enterprise, Windows 8.1 Enterprise, Windows 10 Enterprise versions 1507 - 1809, Windows 10 Long-Term Servicing Branch (LTSB) versions 1507 & 1607, Windows 10 Long-Term Servicing Channel (LTSC) version 1809 Once an in-place upgrade of Windows is performed on a machine, a Windows. Which is the reason, the option to clean up system files, isn't removing the directory. After that, the files permissions will be reset and you can delete the folder. To reset all the files permissions, type: icacls /T /Q /C /RESET. The files contained with $WINDOWS.~BT are not technically system files. Press windows key + X and choose (Command Prompt Admin) or Run cmd as Administrator.
DELETE $WINDOWS. BT HOW TO
Use the button Clean up system files to compute how to remove the $WINDOWS.~BT folder. What is its purpose Is it safe to delete it The WINDOWS.BT folder is a temporary folder created by Windows Update, which contains update logs and files. Attempt to launch cleanmgr on the C:\ drive.