Fletch, you probably has Windows ME. This folder will be empty if you ‘disable’ the System Restoration (I think there is an icon for System into Control Panel and the option for this disabling). Boot the computer. Enable System Restoration again. I think the files will gone away. Probably they are ‘protected with a internal password, gived by Windows’ and could not be accessed or scanned. It’s quite safe to delete them by the way I have mentioned.