What are the $NtUninstallKBxxxxxxx$ folders in Windows?

Updated: 04/26/2017 by Computer Hope

Microsoft WindowsFolders such as $NtUninstallKB42773$, $NtUninstallKB873339$, $NtUninstallQ329048$, contain the files necessary to uninstall a Microsoft Windows updates that has been installed on your computer. These folders are hidden in the "Windows" or "Winnt" folder depending on your version of Windows and are shown if you are displaying hidden files on your computer.

If you're running out of disk space on your computer these folders are safe to delete. However, for safety precautions we suggestion only deleting the folders that are at least a few months or few years old. In some rare situations it may be necessary to uninstall more recent patches.

To locate and delete these files follow the steps below.

  1. Open My Computer.
  2. Within My Computer Open the C: drive.
  3. Open the Windows or Winnt folder.
  4. Within this folder the first folders listed should be $NTUninstall folders if you're computer has hidden files shown. If you're wanting to delete the files select all folders that begin with $NTUninstall that are older than a month and press the delete key on the keyboard.

Additional information