Windows XP is creating a backup of every patch that you install for the operating system. The files are placed in the Windows directory and start with $NtUninstall. Microsoft is creating those backups so that the user can easily uninstall the patch if problems should arise.
Is it safe to delete $NtUninstall files ?
You might have noticed a lot of hidden files in your Windows directory starting with the string $NtUninstall and maybe you asked yourself the question if it was save to delete those files. Those $NtUninstall are created whenever you install a new service pack or patch from Microsoft. Most folders end with KBxxxxxx which related to the corresponding Knowledge Base article about the update.
