Original connection http://www.techspot.com/tweaks/wfp/index.shtml Note: Only translating the Windows File Protection (WFP) Windows file protection This is Microsoft's latest in Win2K and upgraded as a new feature Microsoft's latest effort in system stability. (Desp is a unique function of a uncomfortable role) Working: WFP defines some of the important files of the system as the system. These files are backed up to the DLLCache folder when these files are replaced or override. WFP will restore these files according to DLLCache's backup when these files are replaced or override, while the Windows installation disc is inserted into the Windows installation disc. Uses: Mainly to prevent misconstruction or cover system files. More useful for multi-user machines. (I think this is really no practical benefits) Update system file: Since there is this protection warning measure, how do we make normal updates to system files? There are several ways. 1. Use Microsoft's Upgrade Pack Service Packs 2. Use Windows Update (Windows Online Upgrade Features) 3. (until finished) Prohibits WFP method: http://www.winguides.com/registry/display.php/790/